هَدَمَ He threw down, or pulled down, a building; (Mṣb;) pulled it to pieces; demolished it; destroyed it: (Ḳ:) [the last two explanations are the most correct, as is shown by the phrase] نَقَضَ البِنَآءَ مِنْ عَيْرِ هَدْمِ [He took to pieces the building without demolishing, or destroying]: (Ṣ, A, Mṣb, Ḳ,* in art. قوض:) he ruined [a building, &c.]; reduced [it] to ruin. (Ḥam, p. 31.)

تَهَادَمَتِ الحِيطَانُ [The walls fell to ruin by degrees]. (Ṣ, in art. دعو.)

اِنْهَدَمَ It became thrown down, pulled down, pulled to pieces, demolished, or destroyed: and it fell in ruins, or to pieces; or became a ruin.

اِنْهَدَمَ الحَائِطُ مِنْ مَكَانِهِ مِنْ غَيْرِ هَدْمٌ [The wall fell in ruins, or to pieces, from its place, without being pulled to pieces]. (Lth, in TA, art. قيض.)

هَدَمٌ Earth that is dug from a pit or well: see حَفَرٌ.