noun

1. an official doorkeeper
2. a person whose duty it is to show people to their seats in a theater, church, etc.
3. a person whose official duty is to precede someone of rank, as in a procession, or to introduce unacquainted persons at a formal function
4. any of the groom's attendants at a wedding whose duties include showing guests to their seats and escorting the bridesmaids
5. Obsolete in Great Britain, an assistant teacher in a boys' school

Etymology: ME ussher < OFr uissier < L ostiarius, doorkeeper: see ostiary

transitive verb

1. to act as an usher to; escort or conduct (others) to seats, etc.
2. to precede, or be a forerunner of: often with in