The word(s) "sign" appears 461 time(s) in 421 verse(s) in Quran in Abdullah Yusuf Ali translation.

(231) Is it not a warning to such men (to call to mind) how many generations before them We destroyed, in whose haunts they (now) move? Verily, in this are signs for men endued with understanding.

(232) They say: "Why does he not bring us a sign from his Lord?" Has not a Clear sign come to them of all that was in the former Books of revelation?

(233) And if We had inflicted on them a penalty before this, they would have said: "Our Lord! If only Thou hadst sent us a messenger, we should certainly have followed Thy signs before we were humbled and put to shame."

(234) "Nay," they say, "(these are) medleys of dream! - Nay, He forged it! - Nay, He is (but) a poet! Let him then bring us a sign like the ones that were sent to (Prophets) of old!"

(235) And We have made the heavens as a canopy well guarded: yet do they turn away from the signs which these things (point to)!

(236) Man is a creature of haste: soon (enough) will I show you My signs; then ye will not ask Me to hasten them!

(237) We helped him against people who rejected Our signs: truly they were a people given to Evil: so We drowned them (in the Flood) all together.

(238) And (remember) her who guarded her chastity: We breathed into her of Our spirit, and We made her and her son a sign for all peoples.

(239) Thus have We sent down Clear signs; and verily Allah doth guide whom He will!

(240) Being true in faith to Allah, and never assigning partners to Him: if anyone assigns partners to Allah, is as if he had fallen from heaven and been snatched up by birds, or the wind had swooped (like a bird on its prey) and thrown him into a far-distant place.