1. (of a woman) plump, with a full figure and large breasts:"a buxom blonde"
Word OriginMiddle English: from the stem of Old Englishbūgan ‘to bend’ (see bow2) + -some1. The original sense was ‘compliant, obliging’, later ‘lively and good-tempered’, influenced by the traditional association of plumpness and good health with an easy-going nature.