Liberal Dictionary English Dictionary
adjective Informal.
- simple and modest; unadorned; basic: a plain-Jane car dressed up with leather upholstery.
noun Informal.
- a drab, unattractive, and generally uninteresting girl or woman.
“unattractive woman,” first attested 1912.
plain-jane
adjective Informal.
noun Informal.
“unattractive woman,” first attested 1912.