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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1. What's done by night appears by day. 
2. The day has eyes, the night has ears.
3. At night, all cats are grey.
4. What is done by night appears by day.
5. An owl is the king of the night.
6. Joy often comes after sorrow, like morning after night.
7. Now I shall go to sleep. Good night.
8. Lack of knowledge is darker than night.
9. Make the night night, and the day day, and you will have a pleasant time of it.
10. Red sky at night shepherd's delight; red sky in the morning, shepherd's warning.
11. We're as different as night and day.
12. The meeting extended late into the night.
13. Last night they stayed at home and watched TV.
14. The night deep dark blue eyes.
15. It's yonks since we had a good night out.
16. A huge bomb blast rocked central London last night.
17. It's one of those arts programmes late at night.
18. He picked up a metallic ring last night.
19. They embarked the troops by night.
20. Rampant spread of those wanton in the night.sentencedict.com
21. The hotel costs ￡65 per person per night.
22. A scream broke the silence of the night.
23. Leaders of the banned party were arrested last night.
24. They've worked night and day to publicise their campaign.
25. The enemy resistance thinned out as night approached.
26. I had a terrible dream last night.
27. They stayed talking until well into the night.
28. The law is not the same at morning and at night.
29. Cover your head by day as much as you will,[sentencedict.com] by night as much as you can.
30. The living man who does not learn is dark, dark like one walking in the 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.