Noun Adjective Verb B1 — Intermediate /ˈsʌb.dʒɪkt/ (noun/adj)  ·  /səbˈdʒekt/ (verb)

Subject — Definition, Examples & Usage

An area of study, the doer in a sentence, or something dependent on conditions — one word, three essential meanings.

Quick Definition
Noun (1)

An area of study at school, university, or in general discussion: "Grammar is a subject that many learners find challenging at first."

Noun (2) — Grammar

The noun phrase in a clause that typically performs or controls the action of the verb: in "The teacher explains the rule", the teacher is the subject.

Adjective — subject to

Dependent on, conditional upon, or likely to be affected by: "All prices are subject to change."

Verb — to subject (someone) to

To cause someone or something to experience something, usually unpleasant or demanding: "The committee subjected the proposal to intense scrutiny."

What Does Subject Mean?

Subject is one of the most versatile words in English, operating across three parts of speech. As a noun it covers both everyday life (a school subject) and the mechanics of language (the grammatical subject of a sentence). As an adjective in the fixed phrase subject to, it appears constantly in formal, legal, and business writing. As a verb it carries a more forceful meaning — causing someone to undergo an experience.

A key feature learners must remember is the stress shift. When subject functions as a noun or adjective, the stress falls on the first syllable: SUB-ject (/ˈsʌb.dʒɪkt/). When it is a verb, the stress moves to the second syllable: sub-JECT (/səbˈdʒekt/). This pattern — where the same spelling shifts stress depending on its grammatical role — also applies to record, permit, protest, and object.

In academic English, subject matter (the content of a text or discussion) and subject heading (a category label in libraries or databases) are frequent and important collocations. In grammar pedagogy, understanding the subject is fundamental: without correctly identifying the subject, learners cannot apply subject-verb agreement rules.

Etymology

Latin subjectus (past participle of subicere: "to bring under, to throw under") → sub- (under) + jacere (to throw) → Old French sujet → Middle English suget / subject (14th century). The original sense was political — a person under the authority of a ruler. The grammatical sense (the part of a sentence "under" discussion) and the academic sense (a field of study "placed before" a student) both developed in the 15th–16th centuries.

Example Sentences by Level

SentenceLevelUsage note
My favourite subject at school is maths. A2 subject as school discipline (noun)
Grammar is a subject that many learners find challenging at first. B1 subject as academic field (noun); relative clause
In the sentence “Dogs love walks”, the word dogs is the subject. B1 grammatical subject (noun); metalinguistic use
The timetable is subject to change without notice. B2 subject to = dependent on (adjective phrase); formal register
Migrant workers were subjected to exploitative conditions that violated their basic rights. C1 to subject someone to (verb, passive); academic/journalistic register

Collocations

CollocationExample
favourite subjectWhat is your favourite subject at school?
compulsory subjectEnglish is a compulsory subject in most secondary schools.
change the subjectHe felt uncomfortable and quickly changed the subject.
on the subject ofOn the subject of pronunciation, many teachers disagree.
subject matterThe subject matter of this course is advanced grammar.
subject headingSearch the database using the subject heading "syntax".
subject to approvalThe contract is subject to board approval.
subject to changeAll departure times are subject to change.
subject someone toThe researchers subjected participants to a series of tests.
drop a subjectShe decided to drop chemistry as a subject in Year 11.

Usage Notes

Three words you might confuse with subject

Subject vs. topic: A subject is a broad field of study or discussion (history, grammar, climate change). A topic is a specific point within that subject (the French Revolution, past tenses, rising sea levels). Use subject for the wider category; use topic for the narrower focus.

Subject vs. theme: A theme is a recurring idea or message in a creative or literary work — not a field of study. You can have a theme of redemption in a novel, but not a theme of mathematics at school. Use subject or topic in academic and educational contexts.

Subject (noun) vs. subject (verb): Remember the stress difference — SUB-ject (noun/adjective) vs. sub-JECT (verb). In writing this is invisible, but in speech the wrong stress sounds unnatural. The verb is nearly always followed by to: subject someone to something.

Common Mistakes

Watch Out For

The subject of the sentence are the students.

The subject of the sentence is the students. (subject-verb agreement: "the subject" is singular)

Even when the subject refers to a plural noun, the verb agrees with the head noun "subject", not with "the students".

She was subject of several investigations.

She was the subject of several investigations. (definite article required)

"The subject of" is a fixed noun phrase and requires "the".

The students were subjected with difficult questions.

The students were subjected to difficult questions. (verb "subject" always collocates with "to", not "with")

Can we change the topic? (when referring to a school course)

Can we change the subject? (in conversation) / She studies three subjects. (in education)

"Topic" refers to a specific point of discussion; "subject" refers to a course or broad field of study.

Related Words

object verb topic theme subjective subjectivity subject matter subject-verb agreement

Synonyms

topic theme discipline field area matter issue

Practise This Word

Flash Cards Complete the Sentence Vocabulary Quiz Hangman

Frequently Asked Questions about “subject”

What does subject mean in English?
Subject has three main meanings. As a noun it refers to (1) an area of study at school or university (e.g. 'History is my favourite subject') or (2) the noun phrase in a sentence that performs the action of the verb. As an adjective, 'subject to' means dependent on or likely to be affected by something (e.g. 'Prices are subject to change'). As a verb (pronounced sub-JECT), 'to subject someone to something' means to cause them to experience something unpleasant.
What is the difference between subject and topic?
Subject is broader than topic. A subject is a general field of study or discussion (e.g. science, history, grammar). A topic is a specific point within that subject (e.g. the water cycle, the Second World War, present tenses). You study a subject; you discuss a topic. In everyday speech the two words are often used interchangeably, but in academic contexts the distinction matters.
How do you pronounce subject as a noun and as a verb?
The stress shifts depending on the part of speech. As a noun or adjective, the stress falls on the first syllable: SUB-ject (/ˈsʌb.dʒɪkt/). As a verb meaning 'to cause to experience', the stress shifts to the second syllable: sub-JECT (/səbˈdʒekt/). This stress-shift pattern is common in English two-syllable words that function as both nouns and verbs, such as record, permit, and protest.
What is a subject in grammar?
In grammar, the subject is the noun phrase that performs or controls the action of the verb. In the sentence 'The teacher explained the rule', the subject is 'The teacher'. The subject usually comes before the verb in declarative sentences, and it agrees with the verb in number (singular or plural). Every complete sentence must have a subject and a verb.
What does 'subject to' mean?
'Subject to' is a common adjective phrase meaning 'conditional on', 'dependent on', or 'likely to be affected by'. Examples: 'All bookings are subject to availability.' 'These regulations are subject to change.' 'The offer is subject to approval.' It is very common in formal, legal, and business English.
What is the verb form of subject?
The verb 'to subject' (stressed sub-JECT) means to cause someone or something to experience something, usually something unpleasant or difficult. It is followed by the preposition 'to': 'The prisoners were subjected to harsh conditions.' 'She was subjected to a lengthy interview.' The past participle 'subjected' is especially common in formal and journalistic writing.
What are common collocations with subject?
Common collocations with subject as a noun include: favourite subject, compulsory subject, drop a subject, study a subject, change the subject, on the subject of, subject matter, subject heading, and the subject of debate. In grammar: sentence subject, grammatical subject, subject-verb agreement. In formal contexts: subject to approval, subject to change, subject to conditions.
What is the difference between subject and object in grammar?
The subject performs the action; the object receives it. In 'The student read the book', 'the student' is the subject and 'the book' is the object. Pronouns reflect this: I/he/she/we/they are subject pronouns; me/him/her/us/them are object pronouns. Confusing subject and object pronouns is a very common mistake even among advanced learners of English.
What is the etymology of the word subject?
Subject comes from the Latin 'subjectus', the past participle of 'subicere', meaning 'to bring under' or 'to throw under' — from 'sub-' (under) and 'jacere' (to throw). It entered Middle English via Old French 'sujet' in the 14th century, originally meaning a person under the authority of a ruler. The grammatical and academic senses developed later.
How can I practise using subject in English?
Try LexFizz's Complete the Sentence exercise to see subject used in context across its different meanings. The Flash Cards tool helps you practise subject alongside related vocabulary such as topic, object, verb, and predicate. For the grammar sense, the Grammar Glossary entry on subjects and predicates provides detailed explanations and exercises.