Real Dictionary

swastika
countable noun: A swastika is a symbol in the shape of a cross with each arm bent over at right angles. It is used in India as a good luck sign, but it was also used by the Nazis in Germany as their official symbol.

swastika in American English
a design or ornament of ancient origin in the form of a cross with four equal arms, each bent in a right-angle extension: a mystic symbol found in both the Old World and the New World
noun: a figure used as a symbol or an ornament in the Old World and in America since prehistoric times, consisting of a cross with arms of equal length, each arm having a continuation at right angles

swastika in British English
noun: a primitive religious symbol or ornament in the shape of a Greek cross, usually having the ends of the arms bent at right angles in either a clockwise or anticlockwise direction