Define plain
plain: express complaints, discontent, displeasure, or unhappiness; clearly revealed to the mind or the senses or judgment; not elaborate or elaborated; lacking patterns especially in color; not mixed with extraneous elements; free from any effort to soften to disguise; lacking embellishment or ornamentation; lacking in physical beauty or proportion; extensive tract of level open land; a basic knitting stitch; unmistakably ('plain' is often used informally for 'plainly')
Updated on Saturday, February 04 2012 at 03:41AM EST
Source:
wordnetweb.princeton.edu/...