Definitions

1. adjective

not plump or buxom (especially in a way that is considered attractive or appealing)

“In the 16th-century literature, women who were unbuxom were often depicted as unattractive and lacking in charm.”

2. noun

a woman who is not plump or buxom

“The term ‘unbuxom wench’ was used to describe a woman who was not considered attractive by the standards of the time.”