security guard

WordReference Random House Unabridged Dictionary of American English © 2026

secu′rity guard′, 

1. a uniformed guard employed by a bank, airport, office building, etc., to maintain security.

• 1955–60

Collins Concise English Dictionary © HarperCollins Publishers::

security guard noun

1. a person employed to protect buildings, people, etc, and to collect and deliver large sums of money