'Signs' in the Bible

When, however, he came out, he was unable to speak to them; and they knew that he must have seen a vision in the Sanctuary; but he kept making signs to them and continued dumb.

They asked his father by signs what he wished him to be called.

"There will be signs in sun, moon, and stars; and on earth anguish among the nations in their bewilderment at the roaring of the sea and its billows;