The term USED ASL is a crossword solution that refers to the use of American Sign Language (ASL). ASL is a visual language used by members of the deaf community in the United States and parts of Canada. It is composed of hand shapes, facial expressions, and body movements that are used to communicate with others. ASL is the most commonly used sign language in North America and is recognized as a language in its own right. The term SIGNED, which has 6 letters, is an appropriate crossword solution for USED ASL.