an area of land not significantly higher than adjacent areas and with relatively minor differences in elevation, commonly less than 500 feet (150 meters), within the area.
(of fabric) without pattern or of simple untwilled weave
8.
not attractive
9.
not mixed; simple: plain vodka
10.
knitting of or done in plain
—n
11.
a level or almost level tract of country, esp an extensive treeless region
12.
a simple stitch in knitting made by putting the right needle into a loop on the left needle, passing the wool round the right needle, and pulling it through the loop, thus forming a new loop
13.
in billiards
a. the unmarked white ball, as distinguished from the spot balls
b. the player using this ball
14.
(in Ireland) short for plain porter, a light porter: two pints of plain, please
—adv
15.
(intensifier): just plain tired
[C13: from Old French: simple, from Latin plānus level, distinct, clear]
"level country," c.1300 (originally in ref. to Salisbury Plain), from O.Fr. plain, from L. planum "level ground, plain," properly neut. of adj. planus "flat, even, level" ((see plane (1)). L. planum was used for "level ground" but much more common was campus. Plains of the
An extensive, relatively level area of land. Plains are present on all continents except Antarctica and are most often located in the interior regions. Because they can occur at almost any altitude or latitude, plains can be humid and forested, semiarid and grass-covered, or arid.
A broad, level expanse, such as an area of the sea floor or a lunar mare.