- to unsubscribe from an online service, email updates, marketing messages, etc.:The service renews automatically, but you can unsub at any time.
- a person or an account that unsubscribes from an online service:The site sent too many spam emails in a single day and was flooded with unsubs.
- a suspect in a crime investigation whose identity or name is not known.
- not furnished or supported by a subsidy; unsubsidized:unsub loans.
