signed

adj. describes a document that has a signature on it.

adj. bearing a signature; officially endorsed or authenticated by a person's handwritten name.

“Please return the signed copy of the lease to the office.”

“The archive contains several signed first editions, each featuring a personal dedication from the author to his contemporary peers.”

Formal

adj. in math, a number that can be either positive or negative.

adj. capable of having either a positive or negative value, typically indicated by a plus or minus symbol.

“A signed integer can represent both positive and negative whole numbers.”

“The programmer opted for a signed 32-bit integer to ensure the variable could account for negative temperature readings in the simulation.”

Technical

adj. expressed using hand signals instead of spoken words.

adj. communicated or performed through the medium of sign language.

“The signed performance allowed the deaf audience members to enjoy the play.”

“The news broadcast included a signed interpretation in the corner of the screen to ensure accessibility for the hearing-impaired community.”