adj. plain·er, plain·est 1. Free from obstructions; open; clear: in plain view. 2. Obvious to the perception or mind; evident: make one's intention plain. See Synonyms at apparent. 3. a. Not elaborate or complicated; simple: plain food. b. Marked by little or no ornamentation or decoration: plain garb. c. Straightforward; frank or candid: plain talk. d. Not pretentious; unaffected. e. Lacking beauty or distinction: a plain face. 4. Not mixed with other substances; pure: plain water. 5. Common in rank or station; average; ordinary: a plain man. 6. Not dyed, twilled, or patterned: a plain fabric. 7. Sheer; utter; unqualified: plain stupidity. 8. Archaic Having no visible elevation or depression; flat; level. n. 1. a. often plains An extensive, level, usually treeless area of land. b. A broad level expanse, as a part of the sea floor or a lunar mare. 2. Something free of ornamentation or extraneous matter. adv. Informal Clearly; simply: plain stubborn. [Middle English, from Old French, from Latin plānus; see pelə-2 in the Appendix of Indo-European roots.] plainly adv. plainness n. Synonyms: plain, modest, simple, unpretentious These adjectives mean not ornate, ostentatious, or showy: a plain hairstyle; a modest cottage; a simple dark suit; an unpretentious country church. Antonym: ornate |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.