A signal is a form of communication that conveys information or instructions. The crossword solutions for the term signal include 'HERALD' (6 letters), which is a person who announces important news; 'KEY' (3 letters), which is an object used to open a lock; 'CATCHWORD' (9 letters), which is a WORD or phrase that is used to attract attention; 'CALL' (4 letters), which is a request for someone to come; 'ALERT' (5 letters), which is a warning of danger; 'BECKON' (6 letters), which is a GESTURE inviting someone to come closer; 'message' (7 letters), which is a communication sent from one person to another; 'EVIDENCE' (8 letters), which is proof or facts that support a conclusion; 'CONSPICUOUS' (11 letters), which is easily seen or noticed; 'NOTICEABLE' (10 letters), which is able to be seen or noticed; 'CUE' (3 letters), which is a hint or suggestion; 'NOD' (3 letters), which is a GESTURE of agreement; 'WORD' (4 letters), which is a unit of language; 'DENOTE' (6 letters), which is to indicate or refer to something; 'BETOKEN' (7 letters), which is to be a sign of something; and 'GESTURE' (7 letters), which is a movement of the body or hands that expresses an idea or feeling.