night; nighttime
Often used in compound nouns and formal or official contexts, such as 夜間営業 (nighttime business hours) or 夜間飛行 (night flight). As an adverb, it means 'at night' or 'during the night'.
This shop is open at night as well.
夜間の外出は危険です。
Going out at night is dangerous.
Driving at night reduces visibility.
Going out at night can sometimes be dangerous.
open at night; nighttime business
night school; evening school