/ Dictionary / Index P plain Jane: Meaning and Definition of Find definitions for: plain' Jane' Pronunciation: [key] — Informal. Informal. a drab, unattractive, and generally uninteresting girl or woman. plain-Jane Pronunciation: (plān'jān'), [key] — adj. Informal. simple and modest; unadorned; basic: a plain-Jane car dressed up with leather upholstery. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Plainfield plain knit Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language