booster unit booster station • boost up · · · Info · Definitions · Synonyms · Characters · · booster unit · · Text Common · · Latin · · Scripts 12 · · Length 4 · · Syllables Definitions · · · (noun) the first stage of a multistage rocket. Synonyms: booster, booster rocket, booster unit, takeoff booster, takeoff rocket. · · Noun Definition 1 Synonyms · · · booster · · Synonym 1 booster rocket · · Synonym 2 takeoff booster · · Synonym 3 takeoff rocket · · Synonym 4 Characters · · space U+0020 b latin small letter b U+0062 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075