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

(251) A sura which We have sent down and which We have ordained in it have We sent down Clear signs, in order that ye may receive admonition.

(252) And Allah makes the signs plain to you: for Allah is full of knowledge and wisdom.

(253) We have indeed sent down signs that make things manifest: and Allah guides whom He wills to a way that is straight.

(254) O ye who believe! let those whom your right hands possess, and the (children) among you who have not come of age ask your permission (before they come to your presence), on three occasions: before morning prayer; the while ye doff your clothes for the noonday heat; and after the late-night prayer: these are your three times of undress: outside those times it is not wrong for you or for them to move about attending to each other: Thus does Allah make clear the signs to you: for Allah is full of knowledge and wisdom.

(255) But when the children among you come of age, let them (also) ask for permission, as do those senior to them (in age): Thus does Allah make clear His signs to you: for Allah is full of knowledge and wisdom.

(256) It is no fault in the blind nor in one born lame, nor in one afflicted with illness, nor in yourselves, that ye should eat in your own houses, or those of your fathers, or your mothers, or your brothers, or your sisters, or your father's brothers or your father's sisters, or your mother's brothers, or your mother's sisters, or in houses of which the keys are in your possession, or in the house of a sincere friend of yours: there is no blame on you, whether ye eat in company or separately. But if ye enter houses, salute each other - a greeting of blessing and purity as from Allah. Thus does Allah make clear the signs to you: that ye may understand.

(257) And We command: "Go ye both, to the people who have rejected our signs:" And those (people) We destroyed with utter destruction.

(258) And the people of Noah,- when they rejected the messengers, We drowned them, and We made them as a sign for mankind; and We have prepared for (all) wrong-doers a grievous Penalty;-

(259) Those who, when they are admonished with the signs of their Lord, droop not down at them as if they were deaf or blind;

(260) If (such) were Our Will, We could send down to them from the sky a sign, to which they would bend their necks in humility.