Meaning of plain-vanilla

plain-va•nil•la

Pronunciation: (plān'vu-nil'u), [key]
— adj. Informal.
  1. having no embellishments, extra equipment, elaborate packaging, etc.; plain; simple; down-to-earth: I want a plain-vanilla car without a lot of chrome trim.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.