غسم

غَسَمٌ ذ The darkness (S, ISd, TA) of night; (ISd, TA;) like غَسَقٌ: (S, TA:) or blackness: (Kr, K:) and (K) accord. to En-Nadr, (S,) the confusedness, or blending, of the darkness: (JK, S, K:) and the first rising of the dawn. (JK.) ― -b2- And Dust, or dust rising, or spreading, like smoke; syn. هَبْوَةٌ and غَبَرَةٌ (K) or غُبْرَةٌ [which sometimes signifies the same as غَبَرَهٌ]. (CK.)