noun
Refers to the time around 12 PM. Often used in compounds like 昼休み (lunch break) or 昼食 (lunch).
See also: お昼
昼の12時に会いましょう。
Let's meet at noon.
昼休みはいつも公
I always spend my lunch break in the park.
noun, adverb
Only when written 昼 / 晝
Used for the period of daylight, as opposed to night. Can function as a noun or adverbially.
See also: お昼
昼のうちに買い物を済ませよう。
Let's finish the shopping during the daytime.
彼は昼も夜も働いている。
He works day and night.
noun
Only when written 昼 / 晝
Short for 昼食 or 昼ご飯. Common in casual conversation.
See also: お昼
昼は何を食べましたか？
What did you have for lunch?
昼にラーメンを食べに行かない？
Want to go get ramen for lunch?