The term SIGN HOLDER can be broken down into two words: POST and SIGN. POST is a four letter word meaning to place or affix something in a particular spot. SIGN is a four letter word meaning a visible mark, gesture, or sound used to convey information or instructions. A SIGN holder is a person who is responsible for displaying signs in a public area. They are typically employed by businesses to advertise their products or services. SIGN holders must be able to read and understand the signs they are displaying, as well as be able to communicate effectively with customers.