signature mark (sign a turm ark)

Same as signature, 5. sig naturist (sig'nā-tur-ist), n. [ sign-board (sin'bord), n. A board on which a notice is fixed, as of one's place of busine , 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.