Antonym: day. Similar words: at night, by night, nightmare, midnight, overnight, day and night, night and day, at midnight. Meaning: [naɪt] 
n. 1. the time after sunset and before sunrise while it is dark outside 2. the time between sunset and midnight 3. the period spent sleeping 4. the dark part of the diurnal cycle considered a time unit 5. darkness 6. a shortening of nightfall 7. a period of ignorance or backwardness or gloom 8. Roman goddess of night; daughter of Erebus; counterpart of Greek Nyx.
n. 1. the time after sunset and before sunrise while it is dark outside 2. the time between sunset and midnight 3. the period spent sleeping 4. the dark part of the diurnal cycle considered a time unit 5. darkness 6. a shortening of nightfall 7. a period of ignorance or backwardness or gloom 8. Roman goddess of night; daughter of Erebus; counterpart of Greek Nyx. 
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211. He's still sleeping; he was surfeited with too much wine last night.
212. I have been wrestling with the difficult examination paper the whole night.
213. The constellations in the night sky cannot be directly equated with the heroes of Greek mythology.
214. The old duck quacked and quacked so I hardly slept a wink last night.
215. I have to check my tent-it got soaked last night in the storm.
216. The prisoner alleges that he was at home on the night of the crime.
217. It's a good idea to spend the first night of your holiday sleeping off the jet lag.
218. People can go out to work in the daylight hours and then come to night school in the evening.
219. A cinema was burnt out in north London last night. Police suspect arson.
220. It takes him several months to acclimatize himself to working at night.
221. Read the five drum in the middle of the night(sentencedict.com/night.html), but the play fast and loose.
222. I'm sorry to have to knock you up in the middle of the night.
223. If you're walking along a badly-lit road at night you should wear conspicuous clothes.
224. You should bar the door before retiring for the night.
225. On the night the murder was committed , he was out of the country.
226. Can't sleep at night. Can't get up in the morning.
227. He hollowed out a cave in the snowfield for night.
More similar words: at night, by night, nightmare, midnight, overnight, day and night, night and day, at midnight, highlight, right, light, might, eighth, slight, height, flight, light up, delight, all right, tightly, in sight, tighten, insight, fighter, lightly, lighting, right away, slightly, lightning, out of sight.