boost·erBrE/ˈbuːstə(r)/NAmE/ˈbuːstər/noun (also ˈbooster rocket) arocket that gives a spacecraft extra power when it leaves the earth, or that makes a missilegofurther助推器adevicethatgivesextrapowertoapieceofelectricalequipment(电器的)升压机,升压器anextrasmallamountofadrugthatisgiventoincreasetheeffectofonegivenearlier, forexampletoprotectyoufromadiseaseforlonger加强剂量◆atetanusbooster破伤风加强剂athingthathelps, encouragesorimprovessb/sth帮助(或激励、改善)…的事物◆amorale/confidencebooster士气/信心的激励(especiallyNAmE) apersonwhogivestheirsupporttosb/sth, especiallyinpolitics(尤指政治上的)支持者,拥护者◆ameetingofRepublicanboosters共和党支持者的会议