| Main Entry: | nighttime |
| Part of Speech: | noun |
| Definition: | darkness |
Synonyms: |
bedtime, dusk, midnight, night, nightfall |
| Main Entry: | dark |
| Part of Speech: | noun |
| Definition: | place, time without light |
Synonyms: |
caliginosity, darkness, dead of night, dimness, dusk, duskiness, evening, gloom, midnight, murk, murkiness, night, nightfall, nighttime, obscurity, opacity, semidarkness, shade, shadows, twilight, witching hour |
Antonyms: |
brightness, day, daylight, daytime, illumination, light, lightness, morning |
| Main Entry: | night |
| Part of Speech: | noun |
| Definition: | part of day after sundown and before sunrise |
Synonyms: |
after dark, after hours, bedtime, before dawn, black*, blackness, dark, dark hours, darkness, dead of night, dim, dusk to dawn, duskiness, evening, eventide, gloom, midnight, nightfall, nighttide, nighttime, obscurity*, pitch dark, twilight, witching hour |
Antonyms: |
day |
| Main Entry: | nightly |
| Part of Speech: | adjective, adverb |
| Definition: | each evening; after dark |
Synonyms: |
at night, by night, every night, in the night, night after night, nights, nighttime, nocturnal, nocturnally |
Antonyms: |
daily |
| Main Entry: | nocturnal |
| Part of Speech: | adjective |
| Definition: | happening at night |
Synonyms: |
after dark, late, night, night-loving, nightly, nighttime |
| Notes: | nocturnal means belonging to or active during the night; diurnal means belonging to or active during the day |
| Main Entry: | murkiness |
| Part of Speech: | noun |
| Definition: | dark |
Synonyms: |
caliginosity, darkness, dead of night, dimness, dusk, duskiness, evening, gloom, midnight, murk, night, nightfall, nighttime, obscureness, obscurity, opacity, semidarkness, shade, shadows, twilight, witching hour |
| Main Entry: | obscureness |
| Part of Speech: | noun |
| Definition: | dark |
Synonyms: |
caliginosity, darkness, dead of night, dimness, dusk, duskiness, evening, gloom, midnight, murk, murkiness, night, nightfall, nighttime, obscurity, opacity, semidarkness, shade, shadows, twilight, witching hour |