Ar"go*naut (&?;), n. [L. Argonauta, Gr. &?;; &?; + &?; sailor, &?; ship. See Argo.] 1. Any one of the legendary Greek heroes who sailed with Jason, in the Argo, in quest of the Golden Fleece.

2. (Zoöl.) A cephalopod of the genus Argonauta.

Ar"go*naut (?), n. One of those who went to California in search of gold shortly after it was discovered there in 1848. [U. S.] Bret Harte.

The "Argonauts of '49" were a strong, self- reliant, generous body of men.

Ar"go*naut (?), n. One of those who went to California in search of gold shortly after it was discovered there in 1848. [U. S.] Bret Harte.

The "Argonauts of '49" were a strong, self- reliant, generous body of men.

• A pelagic octopus of the genus Argonautidae.
  
• An adventurer on a dangerous but rewarding quest.
  
• (Greek Mythology) One of the members of the Argo who sailed with Jason in search of the Golden Fleece.
  
• Any of several ships and submarines of the British and US navies.