1.
tonight, this evening
The night of the current day.
今夜、暇ですか。
Are you free tonight?
今夜 means tonight or this evening, referring to the night of the current day.
COMMON EXPRESSIONS:
- 今夜は空いていますか: Are you free tonight?
- 今夜の予定: plans for tonight
- 今夜中に: by tonight, within tonight
RELATED TIME WORDS:
- 今朝: this morning
- 今日: today
- 今晩: this evening (very similar to 今夜)
- 昨夜/昨夜: last night
CONTRAST WITH 今晩:
今夜 emphasizes the night/late hours, while 今晩 is slightly more general for evening.