/ˈekstrə ||; ˈɛkstrə/noun[C] 1 something that costs more, or that is not normally included 额外或额外收费的事物: Optional extras such as colour printer, scanner and modem are available on top of the basic package. 除了基本的套件以外，还供应彩色打印机、扫描仪和调制解调器，不过要另外收钱，可买可不买。
2 a person in a film, etc who has a small unimportant part, for example in a crowd （电影等的）临时演员