(anatomy, somewhat dated) The breast or chest of a human (or sometimes of another animal). / The seat of one's inner thoughts, feelings, etc.; one's secret feelings; desire.

In a very close relationship.

To enclose or carry in the bosom; to keep with care; to take to heart; to cherish. / To conceal; to hide from view; to embosom. / (intransitive) To belly; to billow, swell or bulge.

plural of bosom

Having a bosom (of a specified kind).

Obsolete form of bosom.

plural of bosome

present participle of bosom

A very close friend.

(idiomatic, UK, dated) A secret pledge that one makes for another.