From Longman Dictionary of Contemporary Englishbosombos‧om /ˈbʊzəm/ noun 1 [countable usually singular] writtenHBHDCC the front part of a woman’s chest She cradled the child to her bosom.2 [countable usually plural]HBH a woman’s breast3 → the bosom of the family/the Church etc4 [singular] literaryEMOTIONAL a word meaning someone’s feelings and emotions, used especially when these are bad or unpleasant Drury harboured bitterness in his bosom.5 → bosom friend/buddy/pal
Examples from the Corpus
bosom• It is now that man contemplates, for it is now that the sea is a bosom friend.• She was breathing more quickly now and her bosom was again rising and falling defiantly.• But she looks troubled, unsure of herself - perhaps because her bosom is merely average, one has seen bigger.• Daniel harbored bitterness and anger in his bosom.• Whatever swells as a result, it's unlikely to be the Mellor bosom.• He was still my friend, my bosom friend.• Half the stiff bosom shirts worn nowadays, the laundry is due on them yet.• I am taking you to my home, into the very bosom of my family.Origin bosom Old English bosm 