• Signet ring, a ring with a seal set into it, typically by leaving an impression in sealing wax
• Signet Books, an imprint of the New American Library
• SigneT, a class of racing dinghy, designed in 1961 by Ian Proctor
• Signet (Phi Sigma Kappa), a publication produced by the fraternity Phi Sigma Kappa published four times a year
• Signet Group, the world's largest speciality retail jeweller

See also

• Writers to the Signet, a legal society of solicitors in Scotland
• Cygnet (disambiguation)