'Signify' in the Bible

Now while Peter was puzzling over what the vision he had seen could signify, the men sent by Cornelius had learned where Simon's house was and approached the gate.

and one of them, by name Agabus, having stood up, did signify through the Spirit a great dearth is about to be throughout all the world -- which also came to pass in the time of Claudius Caesar --

Then Paul took the men, and the next day purifying himself with them entered into the temple, to signify the accomplishment of the days of purification, until that an offering should be offered for every one of them.

Now therefore ye with the council signify to the chief captain that he bring him down unto you to morrow, as though ye would inquire something more perfectly concerning him: and we, or ever he come near, are ready to kill him.

For it seemeth to me unreasonable to send a prisoner, and not withal to signify the crimes laid against him.