A vigorous nod of the head, a bold jut of the chin, an enthusiastic thumbs-up: all speak louder than words—yet the same gesture may have different meanings in other cultures. What Americans understand as the "A-OK gesture," for example, is an obscene insult in the Arab world. French polymath François Caradec compiled this illustrated dictionary of 850 gestures and their meanings. Illustrated throughout, it is organized by body part, from head (nodding, shaking, turning) to foot (scraping, kicking, playing footsie).