also: あにさん
Honorific term for one's own older brother or someone else's older brother. Often used with the polite prefix お (お兄さん) in more formal contexts.
See also: お兄さん
兄さんは今、海外に住んでいます。
My older brother lives abroad now.
How old is your older brother?
brother figure; older-brother type
Used for a male acquaintance or colleague treated like an older brother, often in friendly or work relationships. Can be used with or without the polite prefix お.
I consulted a brother-like figure at work.
Familiar, often vocative term for a young man, similar to 'buddy' or 'pal'. Usually used by an older speaker addressing a younger man. It is typically vocative.
Hey buddy, can you give me a hand?
The neighborhood kids call him 'big brother'.
Hey there, could you give me directions?
She relies on her senior colleague like an older brother figure.