- a person who is romantically attracted to someone else but shows it only in a way that does not reveal their own identity, as by sending anonymous gifts or messages: I found an unsigned valentine on my desk from a secret admirer.
- a person who esteems or has a high opinion of someone or something but hides this fact from others: Only after his death, when his diaries were discovered, did we learn that he was a secret admirer of opera.
