The Oxford Thesaurus An A-Z Dictionary of Synonyms - breastn.

1) chest, bosom, bust; teat, Technical mamma, Slang boob, knocker, tit, titty: He clasped the child to his breast. On some beaches in Europe, women bare their breasts when sunbathing. 2) soul, core, heart, heart of hearts: I feel in my breast it is the right thing to do.