The definition of broad refers to something that is wide from side to side, or to something that covers a lot of area.(adjective)
Broad is defined as a slang term used to describe a woman.(noun)
An example of a broad is a woman.
See broad in Webster's New World College Dictionary
Origin: ME brod < OE brad; akin to Ger breit
See broad in American Heritage Dictionary 4
adjective broad·er, broad·est
Origin: Middle English brod
Origin: , from Old English brād.
Learn more about broad