- Proper noun. (Greek mythology) One of the members of the ''Argo'' who sailed with Jason in search of the Golden Fleece.
- Proper noun. Any of several ships and submarines of the British and US navies.
- Proper noun. Team name for the Toronto, Ontario franchise of the Canadian Football League (CFL).
- Noun. A pelagic octopus of the genus ''Argonauta''.
- Noun. An adventurer on a dangerous but rewarding quest.