#1 plain n. [field, champaign] extensive tract of level open land; "they emerged from the woods onto a vast open plain"; "he longed for the fields of his youth". wn
#2 plain s. [unvarnished] free from any effort to soften to disguise; "the plain and unvarnished truth"; "the unvarnished candor of old people and children". wn
#3 plain s. [bare, spare, unembellished, unornamented] lacking embellishment or ornamentation; "a plain hair style"; "unembellished white walls"; "functional architecture featuring stark unornamented concrete". wn
#4 plain v. [complain, kick, sound off, quetch, kvetch] express complaints, discontent, displeasure, or unhappiness; "My mother complains all day"; "She has a lot to kick about". wn
#5 plain r. [obviously, evidently, manifestly, patently, apparently, plainly] unmistakably ('plain' is often used informally for 'plainly'); "the answer is obviously wrong"; "she was in bed and evidently in great pain"; "he was manifestly too important to leave off the guest list"; "it is all patently nonsense"; "she has apparently. wn
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