Night is the part of the day when it is dark, from evening to morning — the period between sunset and sunrise when the sky is dark and most people are asleep.
What Does Night Mean?
Night comes from Old English niht, related to German Nacht and Latin nox (which gives us nocturnal and equinox). It has been used in English for over a thousand years and is one of the most fundamental words in the language.
At its simplest, night describes the dark hours between one day and the next. It is the opposite of day. In everyday speech, people use it to talk about a specific period of darkness ("last night", "three nights in Paris"), about habitual behaviour ("I work best at night"), or about the atmosphere of darkness ("a dark, silent night").
It is important not to confuse night with evening. Evening refers specifically to the early dark hours, roughly from sunset until bedtime, and has a social, often warm connotation. Night covers the full dark period and especially the late hours when people sleep. "Good evening" greets someone at around 6–9 pm; "good night" is a farewell before sleep. See Cambridge Dictionary's full entry on “night” for more examples.
Example Sentences
| Sentence | Level & usage note |
|---|---|
| The sky is very dark at night. | A2 — basic time expression, uncountable use |
| She works night shifts at the hospital. | A2–B1 — compound noun (night shift) as adjective |
| We spent two nights in a small bed and breakfast near the coast. | B1 — countable plural, natural travel context |
| The noise in the middle of the night startled everyone in the house. | B1–B2 — fixed phrase "middle of the night", narrative past |
| Many of the city's nocturnal species are most active during the brief summer nights when temperatures remain mild. | C1 — formal/scientific register, related adjective "nocturnal" |
Common Collocations
| Collocation | Example | Notes |
|---|---|---|
| last night | Did you sleep well last night? | Most common time adverbial; no article needed |
| at night | Owls hunt at night. | Habitual darkness; no article |
| all night | She studied all night for the exam. | Emphasises the full duration |
| night shift | He is on the night shift this week. | Common in healthcare, manufacturing, transport |
| spend the night | We spent the night at my cousin's flat. | Sleep somewhere other than home |
| sleepless night | Stress gave her another sleepless night. | Fixed adjective–noun collocation |
| night sky | The night sky was full of stars. | Common in descriptive and poetic writing |
| in the middle of the night | The baby woke up in the middle of the night. | Fixed phrase; means approximately 2–3 am |
| good night | She kissed the children and said good night. | Farewell at bedtime; also used as a noun |
| overnight | The train travels overnight to Edinburgh. | Adverb/adjective; one word when used before a noun |
Etymology Note
The word night (Old English niht) traces back to Proto-Germanic *nahts and Proto-Indo-European *nókʷts. This ancient root is recognisable across many European languages: German Nacht, Dutch nacht, Latin nox (genitive noctis), Greek nyx, Russian noch. The Latin root gives English a rich family of related words: nocturnal, nocturne, equinox. The silent <gh> in modern English spelling reflects a historical throat-clearing sound (like Scottish loch) that was pronounced in Old and Middle English but disappeared by the 16th century.
Usage Notes
Key Points for ESL Learners
At night vs. in the night: Use at night for general or habitual statements ("Bats fly at night"). Use in the night when referring to a specific point during one particular night ("Something woke me in the night").
Night vs. nights (adverb): Nights can be used informally as an adverb: "She works nights." This is common in British and American English but informal — avoid it in formal writing.
Night as a modifier: Night frequently modifies nouns without a hyphen: night bus, night school, night sky, night train, night life. Note that nightlife (one word) and overnight (one word) are fully merged compounds.
Good night: Unlike "good morning" and "good afternoon", which greet someone, "good night" is almost always a farewell. Saying "good night" when arriving somewhere is unusual and may confuse native speakers.
Common Mistakes
Watch Out For
I woke up at the middle of night.
I woke up in the middle of the night. (fixed phrase — always "in the middle of the night")
She arrived in the night before the conference.
She arrived the night before the conference. (no preposition with "the night before")
He said "good night" when he came into the party.
He said "good evening" when he came into the party. (good night is a farewell, not a greeting)
Related Words
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Want to understand the grammar behind this? Explore our Grammar guides.
Frequently Asked Questions about “night”
What does night mean?
Night means the part of the day when it is dark, from evening to morning. It is the period between sunset and sunrise when the sun is below the horizon. We use it to describe both the time of darkness ('late at night') and the event of one whole dark period ('three nights in a row').
What is the difference between night and evening?
Evening is the early part of the dark period, roughly from sunset until bedtime (around 6 pm to 11 pm). Night refers to the full dark period, including the late hours and the time when most people are asleep. 'Good evening' is used from about 6 pm; 'good night' is a farewell at bedtime.
Is night countable or uncountable in English?
Night is both countable and uncountable. It is countable when referring to individual nights: 'We stayed for three nights.' It is uncountable in general expressions: 'I work best at night.' The uncountable form does not take an article in phrases like 'by night' or 'at night'.
How do you use night in a sentence?
Use 'at night' to mean during the hours of darkness: 'Owls hunt at night.' Use 'last night' to refer to the previous night: 'I slept badly last night.' Use 'the night' with a definite article when referring to a specific night: 'The night before the exam was very stressful.'
What are common collocations with night?
Common collocations include: last night, all night, night shift, overnight, night sky, good night, night-time, late at night, middle of the night, spend the night, and sleepless night. In British English, 'fortnight' (fourteen nights) is also a very common word.
What is the difference between night and nightly?
Night is a noun: 'We spent the night in a hotel.' Nightly is an adjective or adverb meaning 'every night' or 'happening each night': 'The restaurant has nightly live music.' Do not confuse nightly with nocturnally, which is a more formal or scientific term.
What is the origin of the word night?
Night comes from Old English 'niht', which derived from Proto-Germanic '*nahts'. It is related to German 'Nacht', Dutch 'nacht', and Latin 'nox' (giving English 'nocturnal', 'equinox'). The word has been in continuous use in English for well over a thousand years and has barely changed in spelling or meaning.
What is the plural of night?
The plural is nights: 'We booked four nights at the hotel.' It follows the regular English plural pattern with -s. Note that 'nights' is also used informally as an adverb to mean 'during the night hours': 'She works nights at the factory.'
What is a night shift?
A night shift is a period of work that takes place during the night, typically from around 10 pm to 6 am. Many industries such as healthcare, manufacturing, and transport rely on night-shift workers. The adjective form is 'night-shift': 'a night-shift nurse', 'night-shift allowance'.
How can I practise using night in English?
Try LexFizz's Flash Cards to review night alongside related time-of-day vocabulary, or use the Complete the Sentence exercise to practise night in context. Keeping a short evening diary in English — describing what you did last night — is an excellent real-world practice method.