The term 'positive sign' can be represented by four different crossword solutions: NOD (3 letters), PLUS (4 letters), VEE (3 letters), and GOODOMEN (8 letters). NOD is a gesture of agreement or approval, often done with the head. PLUS is a mathematical symbol indicating addition or positive value. VEE is a shape resembling a letter V, which is often used to represent victory or success. GOODOMEN is an archaic spelling of 'good omen, ' which is an event or occurrence that is seen as a sign of good luck.