Etymology
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lying (n.1)
"reclining," early 13c., verbal noun from lie (v.2) "to recline." Lying-in "a being in childbed" is attested from mid-15c.
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lying (n.2)
"untruthfulness, falsehood," c. 1300, "the telling of lies," verbal noun from lie (v.1) "to tell an untruth."
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lying (adj.1)
"being prostrate," late Old English, present-participle adjective from lie (v.2) "to recline."
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lying (adj.2)
"untruthful," early 13c., present-participle adjective from lie (v.1) "to tell an untruth." Related: Lyingly.
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collinear (adj.)

1863, "lying in the same straight line," from col- + linear. Earlier it meant "lying in the same plane."

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lair (n.)
Old English leger "act or place of lying down; bed, couch; illness; the grave," from Proto-Germanic *legraz (source also of Old Norse legr "the grave," also "nuptials" (both "a lying down"); Old Frisian leger "situation," Old Saxon legar "bed," Middle Dutch legher "act or place of lying down," Dutch leger "bed, camp," Old High German legar "bed, a lying down," German Lager "bed, lair, camp, storehouse," Gothic ligrs "place of lying"), from PIE root *legh- "to lie down, lay." Meaning "animal's den" is from early 15c. Essentially the same word as layer (n.), but more ancient and differentiated in sense.
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outlying (adj.)

"outside certain limits, lying beyond the boundary," 1660s, from out- + present participle of lie (v.2). Meaning "remote from the center, lying at a distance from the main body" is attested by 1680s.

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mendacity (n.)

"tendency or disposition to lie, habitual lying," also "a falsehood, a lie," 1640s, from French mendacité and directly from Late Latin mendacitas "falsehood, mendacity," from Latin mendax "lying; a liar" (see mendacious).

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matted (adj.)

"tangled and lying flat" (of hair, vegetation, fibers, etc.), 1610s, past-participle adjective from mat (v.).

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biplanar (adj.)
"lying or situated in two planes," 1849; see bi- "two" + planar.
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