The following are some useful online ASL dictionaries. Because ASL is a visual language, we have included only those dictionaries that offer video or animated definitions. Please note that some of these dictionaries use scripts that may be incompatible with particular browsers. Links to additional dictionaries can be found in other resources.
RID administers the National Testing System that certifies interpreters. It also provides various support services to practicing interpreters, students of interpretation, and persons who share an active interest in the field of interpretation.