Properly, an officer or servant who has the care of the door of a court, hall, chamber or the like; hence, an officer whose business is to introduce strangers, or to walk before a person of rank. In the king’s household there are four gentlemen-ushers of the privy chamber. There is also an usher of the exchequer, who attends the barons, sheriffs, juries.

An under-teacher or assistant to the preceptor of a school.

To introduce, as a forerunner or harbinger; to forerun. The stars that usher evening. The Examiner was ushered into the world by a letter, setting forth the great genius of the author.