Oxford Dictionary English secret agent nounnoun BrE BrE//ˌsiːkrət ˈeɪdʒənt// ; NAmE NAmE//ˌsiːkrət ˈeɪdʒənt// (also agent) Add to my wordlistjump to other resultsa person who is used by a government to find out secret information about other countries or governments synonym spySee secret agent in the Oxford Advanced American DictionaryCheck pronunciation: secret agent oxfordlearnersdictionaries.com