لَعَلَّ [May-be; perhaps]; a word denoting hope and fear. (Ḳ.) It governs the subject in the accus. case, and the predicate in the nom. See Ibn-ʼAḳeel, ed. of Dieterici, p. 90; and see لَيْتَ.

لَعَلَّ, in its original and general acceptation, expresses hope; but in the word of God it [often] expresses certainty, and may be rendered Verily. (Jel, ii. 19.)