An object, quality, or event whose presence or occurrence indicates the probable presence or occurrence of something else. A gesture or action used to convey information or instructions. Each of the twelve equal sections into which the zodiac is divided, named from the constellations formerly situated in each, and associated with successive periods of the year according to the position of the sun on the ecliptic. The positiveness or negativeness of a quantity. Write one's name on (a letter, card, or similar item) to identify oneself as the writer or sender. Use gestures to convey information or instructions.