قَتَرٌ

and ↓ قَتَرَةٌ, (K,) or the latter, and the former is its plural, (S,) [or rather the former is a coll. gen. n., and the latter is the n. un.,] and ↓ قَتْرَةٌ, (K,) Dust; synonym غُبَارٌ, (S,) or غَبَرَهٌ: (K:) so in the Qur'an, 80:41: (AO, S:) or the dust of an army: (Nh:) or dust-colour overspread with blackness: (T, TA:) or blackness and darkness. (Bd, Jel, lxxx. 41.)