unsigned definitions

WordNet (r) 3.0 (2005)

adj
1: lacking a signature; "the message was typewritten and unsigned" [ant: signed]

Oxford Reference Dictionary

adj. not signed.

Collin's Cobuild Dictionary

1. An unsigned document does not have anyone's signature on it. ADJ 2. An unsigned band has not signed a contract with a company to produce CDs. ADJ: usu ADJ n