兄

Formal or literary term

older brother and older sister

biological older brother

elder brother's wife; sister-in-law

foster sibling; foster brother; foster sister

dear friends; (all of) you or those men

sworn brother; buddy; pal

Colloquial; Familiar

elder brother; one's senior

dashing young man; gallant young lad

brothers; male siblings

Common noun

older brother

Pronoun; Used mainly in letters to address an older or same-aged male

you

Of a male equal or superior, usu. in letters by men

you

brotherly love; fraternal love; sibling affection

Humble

(one's) older brother

foolish older brother

favourable direction; favorable direction; lucky direction

middle brother

Used in letters to address a male friend

you

(my) elder brother

Slang

men who have had sex with the same woman; hole brothers

your elder brother

elder brother; elderly person

one's deceased elder brother

Familiar; Used in letters to address a male of equal status

you; dear friend

wise elder brother; polite reference to another's older brother, or to one's senior

sworn elder brother

older male in an homosexual relationship

the younger of two elder brothers