عَقَّةٌ

A deep excavation, hollow, cavity, trench, or the like, in the ground; (K, TA;) as also ↓ عِقٌّ, according to the K, there said to be with kesr, but correctly ↓ عَقٌّ, with fet-h, [q. v.,] which signifies an elongated excavation in the ground, and is originally a verbal noun; thus in the L. (TA.)

And A blaze of lightning extending in an elongated form in the sky, (IDrd, O, K,) or in the side of the clouds, (A, TA,) and said to be as though it were a drawn sword. (TA.) [See also عَقِيقَةٌ.]