What does "signify" mean?

Signify: To mean; to import; to denote; to betoken. He bade her tell him what it signified. Chaucer. A tale Told by an idiot, full of sound and fury, Signifying nothing. Shak. Note: Signify is often used impersonally; as, it signifies nothing, it does not signify, that is, it is of no importance.