secret agent

noun

1. an agent of a secret service.

2. (loosely) a person employed to collect the military secrets of one country and relay them to another, especially a person living in a foreign country while so working for their own nation; spy.

secret agent

noun

1. a person employed in espionage

Word History and Origins

Origin of secret agent¹

First recorded in 1830–40

Related Words

• informer 
• intelligence agent www.thesaurus.com
• operative 
• spy 
• undercover agent www.thesaurus.com