the GNU version of the Collaborative International Dictionary of English
n. One who signs or subscribes his name.
The Century Dictionary and Cyclopedia
n. One who signs; specifically, one who writes his name as a signature: as, the signer of a letter; to get signers to a petition; the signers of the Declaration of Independence.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. someone who can use sign language to communicate
n. someone who signs and is bound by a document
Word Usage
"So, it appears to me that this signer is using UK sign language."