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.
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)