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

(331) And a sign for them is the Night: We withdraw therefrom the Day, and behold they are plunged in darkness;

(332) And a sign for them is that We bore their race (through the Flood) in the loaded Ark;

(333) Not a sign comes to them from among the signs of their Lord, but they turn away therefrom.

(334) And, when they see a sign, turn it to mockery,

(335) And the leader among them go away (impatiently), (saying), "Walk ye away, and remain constant to your gods! For this is truly a thing designed (against you)!

(336) (Here is) a Book which We have sent down unto thee, full of blessings, that they may mediate on its signs, and that men of understanding may receive admonition.

(337) It is Allah that takes the souls (of men) at death; and those that die not (He takes) during their sleep: those on whom He has passed the decree of death, He keeps back (from returning to life), but the rest He sends (to their bodies) for a term appointed verily in this are signs for those who reflect.

(338) Know they not that Allah enlarges the provision or restricts it, for any He pleases? Verily, in this are signs for those who believe!

(339) "(The reply will be:) 'Nay, but there came to thee my signs, and thou didst reject them: thou wast Haughty, and became one of those who reject faith!'"

(340) To Him belong the keys of the heavens and the earth: and those who reject the signs of Allah,- it is they who will be in loss.