The crossword solutions for the term WHAT '<--' SIGNIFIES are LEFT (4 letters) and WINK (4 letters). The term '<--' signifies a LEFT arrow, which is used to indicate direction or movement. It can also be used to indicate that something should be done in the opposite direction of the arrow. A WINK is a facial expression made by closing one eye, usually to indicate humor, irony, or a shared secret. It is also used to express affection, friendship, or flirtation.