بطح1 بَطَحَهُ, aor. ـَ (Msb, TA,) inf. n. بَطْحٌ, (Mgh, TA,) He spread it; spread it out, or forth; expanded it; extended it. (Mgh, * Msb, TA.) b2:  Also, (S, A, K,) or بَطَحَهُ عَلَى وَجْهِهِ, (Mgh, Msb,) aor.  as above, (K,) and so the inf. n., (TA,) He threw him down upon his face. (S, A, Mgh, Msb, K.) b3:  See also 2.2 بطّح المَسْجِدَ, (TA,) inf. n. تَبْطِيحٌ; (K;) and ↓ ابطحهُ; (TA;) He strewed pebbles in the mosque, and made it plain, or level [in its ground, or floor]: (K, TA:) and بَطْحُهُ, [inf. n. of ↓ بَطَحَهُ,] occurring in a trad., also signifies the making it plain, or level. (TA.) 4 أَبْطَحَ see 2.5 تبطّح: see 7. b2:  Also It (a torrent) flowed  widely: (ISd, A:) or spread widely in the بَطْحَآء. (S, K.) b3:  Also, [and ↓ انبطح,] It (a place &c.) spread; spread out, or forth; became expanded or extended. (TA.) A2:  And i. q. اِنْتَصَبَ [It became set up or upright, erected, &c.: thus the verb bears two contr. significations]. (TA.) A3: Also He (a man) took the أَبْطَح as a place of abode. (A, TA.) 7 انبطح It (water) went to the right and left in a place. (AA.) b2:  See also 5. b3:  He became thrown down upon his face: (S, A, K:) or he lay, or lay as though thrown down or extended, upon his face: (Mgh, Msb:) or he stretched himself; or lay, and stretched himself; upon his face, extended upon the ground; as also ↓ تبطّح. (TA.) b4:  It (a valley) became wide; (K, TA;) as also ↓ استبح. (TA.) 10 إِسْتَبْطَحَ see 7.بَطِحٌ: see أَبْطَحُ, in two places.بَطْحَةٌ The stature of a man [app. in a lying posture]: as in the phrase هُوَ بَطْحَةٌ رَجُلٍ [It is of the stature of a man]. (K.) b2:  بَيْنَهُمَا بَطْحَةٌ بَعِيدَةٌ Between them two is a far-extending distance or space or interval. (L.) b3:  See also أَبْطَحُ.بَطْحَآءُ: see أَبْطَحُ, in four places.بِطَاحٌ بُطَّحٌ [Many wide water-courses in which are fine, or minute, or broken, pebbles: the former word is pl. of أَبْطَحُ or of بَطْحَآءُ]: a phrase like أَعْوَامٌ عُوَّمٌ. (As, A 'Obeyd, S.) بَطِيحَةٌ: see أَبْطَحُ.بَاطِحٌ applied to a man, i. q. ↓ مُنْبَطِحٌ [part. n. of 7, q. v.]. (Ham p. 244.) أَبْطَحُ, originally an epithet [and therefore imperfectly decl.], (M, TA,) that is, an epithet converted into a subst., and not used as an epithet, (Ham p. 21,) A wide water-course, or channel of a torrent, in which are fine, or minute, or broken, pebbles; (S, A, K, and Ham ubi suprà;) so called because the water goes in it to the right and left; [i. e. spreads widely; see 7;] (AA;) as also ↓ بَطْحَآءُ, (S, A, K, Ham,) fem. of the former, and, like it, an epithet converted into a subst.; (Ham ubi suprà;) and ↓ بَطِيحَةٌ, (S, K,) and ↓ بَطِحٌ: (K:) or a water-course, or channel of a torrent, in which are sand and pebbles; as also ↓ بَطْحَآءُ: (Mgh:) or a wide place [app. in a water-course]; as also ↓ بطحة [app. بَطْحَةٌ, which is explained by Freytag, but without his stating on what authority, as signifying a depressed place through which water flows, abounding with pebbles; as is also بِطْحَةٌ; and in like manner Golius explains the former, but mentions the latter as a pl. of بطيحة]: (Msb:) or, accord. to AHn, the bottom of a water-course, or channel of a torrent, producing no plants or herbage: (TA:) or ↓ بَطْحَآءُ signifies soft earth of a valley, such as has been drawn along by the torrents: (ISd, TA:) or the soft pebbles in the bottom of the water-course, or channel of a torrent, of a valley; as also أَبْطَحُ: (IAth, TA:) or the soft earth, such as has been drawn along by the torrents, in the bottom of a تَلْعَة [meaning a water-course &c.] and of a valley; and the أَبْطَح and ↓ بَطْحَآء of a valley are its earth and soft pebbles: (En-Nadr, TA:) and accord. to AA, ↓ بَطِحٌ signifies sand in a بَطْحَآء: (TA:) the pl. is أَبَاطِحُ and بِطَاحٌ (S, A, K) and بَطَائِحُ; (K;) the first of these, and the second also, contr. to analogy, being pls. of ابطح; (S;) or both are pls. of بطحآء, contr. to analogy; (Ham p. 251;) or the first is pl. of ابطح, formed after the manner of the pl. of a subst. of this measure, though the sing. is originally an epithet; (M, TA;) and the second, as is asserted by more than one, is correctly pl. of بطحآء, as is also بَطْحَاوَاتٌ; (TA;) and the third is pl. of بطيحة. (M, TA.) مُنْبَطِحٌ [part. n. of 7, q. v.: often applied to anything Spread out, expanded, or flat]: see بَاطِحٌ.