▪ used to refer to the chest as the seat of emotions:"quivering dread was settling in her bosom"Similarheartbreastsoulbeinginner beingcorespiritseat of one's emotionsseat of one's affections
adjective
1. (of a friend) close or intimate:"the two girls had become bosom friends"
Word OriginOld Englishbōsm, of West Germanic origin; related to Dutch boezem and German Busen.