1. A sign; a seal.
“Signum. (On written documents.) A seal (a stamp) put on to close a document in order to make its contents inaccessible to unauthorized persons and protect against forgery, or at the end of it after the written text. In the latter case the seal (without or with a signature) indicated that the sealer recognized the written declaration as his….Signum is also the seal of a witness who was present at the making of a document.” Adolf Berger, Encyclopedic Dictionary of Roman Law 707 (1953).
2. An indication of something seen or otherwise perceived by the senses, such as a bloodstain on a murder suspect. Pl. signa.
