'Sign' in the Bible

Ask thee a sign of Jehovah thy God; ask it either in the depth, or in the height above.

Therefore the Lord himself will give you a sign: behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel.

And it shall be for a sign and for a witness unto Jehovah of hosts in the land of Egypt; for they shall cry unto Jehovah because of oppressors, and he will send them a saviour, and a defender, and he will deliver them.

And Jehovah said, Like as my servant Isaiah hath walked naked and barefoot three years for a sign and a wonder concerning Egypt and concerning Ethiopia;

And this shall be the sign unto thee: ye shall eat this year that which groweth of itself, and in the second year that which springeth of the same; and in the third year sow ye, and reap, and plant vineyards, and eat the fruit thereof.

And this shall be the sign unto thee from Jehovah, that Jehovah will do this thing that he hath spoken:

Hezekiah also had said, What is the sign that I shall go up to the house of Jehovah?

Instead of the thorn shall come up the fir-tree; and instead of the brier shall come up the myrtle-tree: and it shall be to Jehovah for a name, for an everlasting sign that shall not be cut off.

And I will set a sign among them, and I will send such as escape of them unto the nations, to Tarshish, Pul, and Lud, that draw the bow, to Tubal and Javan, to the isles afar off, that have not heard my fame, neither have seen my glory; and they shall declare my glory among the nations.