The noun plain has 2 senses (first 1 from tagged texts)
1. (1) plain, 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")
The verb plain has 1 sense (no senses from tagged texts)
1. complain, kick, plain, sound off, quetch, kvetch -- (express complaints, discontent, displeasure, or unhappiness; "My mother complains all day"; "She has a lot to kick about")
Overview of adj plain
The adj plain has 7 senses (first 6 from tagged texts)
1. (9) apparent, evident, manifest, patent, plain, unmistakable -- (clearly revealed to the mind or the senses or judgment; "the effects of the drought are apparent to anyone who sees the parched fields"; "evident hostility"; "manifest disapproval"; "patent advantages"; "made his meaning plain"; "it is plain that he is no reactionary"; "in plain view")
2. (1) plain -- (not elaborate or elaborated; simple; "plain food"; "stuck to the plain facts"; "a plain blue suit"; "a plain rectangular brick building")
3. (1) plain, unpatterned -- (lacking patterns especially in color)
4. (1) plain, sheer, unmingled, unmixed -- (not mixed with extraneous elements; "plain water"; "sheer wine"; "not an unmixed blessing")
5. (1) plain, unvarnished -- (free from any effort to soften to disguise; "the plain and unvarnished truth"; "the unvarnished candor of old people and children")
6. (1) plain, bare, spare, unembellished, unornamented -- (lacking embellishment or ornamentation; "a plain hair style"; "unembellished white walls"; "functional architecture featuring stark unornamented concrete")
7. homely, plain -- (lacking in physical beauty or proportion; "a homely child"; "several of the buildings were downright homely"; "a plain girl with a freckled face")
Overview of adv plain
The adv plain has 1 sense (no senses from tagged texts)
1. obviously, evidently, manifestly, patently, apparently, plainly, plain -- (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 been living here for some time"; "I thought he owned the property, but apparently not"; "You are plainly wrong"; "he is plain stubborn")