1. （装饰帽子、家具等的）绒球；（美国橄榄球比赛时拉拉队用的）塑料丝球
    A pom-pom is a ball of threads which is used to decorate things such as hats or furniture. In the United States, cheerleaders wave large pom-poms at football matches.

    e.g. ...wide-brimmed hats with red pom-poms worn by the local girls.
           当地女孩戴的宽边、有红色绒球的帽子

noun

1. artillery designed to shoot upward at airplanes

    Synonym: antiaircraftantiaircraft gunflakflackack-ackack-ack gun

2. decoration consisting of a ball of tufted wool or silk
    usually worn on a hat

    Synonym: pompon