1Evening or night — the time from dusk to night; can be used adverbially (e.g., 'in the evening').
晩になると窓の外が急に冷たく感じた。
As evening came, it suddenly felt cold outside the window.
彼は毎晩（晩に）散歩する習慣がある。
He has a habit of taking a walk every evening.
晩のニュースを見てから寝る。
I watch the evening news before sleeping.
2An abbreviation for 'dinner' (晩ご飯) — refers to the evening meal (colloquial).
今日は晩（晩ご飯）にカレーを作るつもりだ。
I'm planning to make curry for dinner tonight.
晩を抜くのは体に良くないよ。
Skipping dinner isn't good for your health.
3A counter for nights (e.g., for counting how many nights something lasts).
三晩寝られなくて疲れた。
I couldn't sleep for three nights and got tired.
何晩か泊まる予定です。
I plan to stay for several nights.