Definitions of usher
a person who shows people to their seats, especially in a theatre, cinema, or at a wedding
The usher is typically a close friend or family member of the couple who is given a role and responsibilities to perform at the wedding.
the person whose job it is to sit by and guard the door in a courtroom or legislative chamber, to lead people to their seat, to help maintain order, or to see that certain things are done correctly
The usher asked him to raise his arm to take the oath.