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1. Oxford Dictionary

   booster

   • IPA[ˈbuːstə]

   英式

   • n.
     a device for increasing electrical voltage or signal strength.；the first stage of a rocket or spacecraft, used to give initial acceleration and then jettisoned.

   • noun: booster, plural noun: boosters

2. • 釋義
   • 相關詞

   n.

   名詞

   • 1. a device for increasing electrical voltage or signal strength.
   • 2. the first stage of a rocket or spacecraft, used to give initial acceleration and then jettisoned.
   • 3. a dose of a vaccine that increases or renews the effect of an earlier one boosters at five-year intervals are recommended a booster injection
   • 4. a source of help or encouragement job fairs are a great morale booster
   • ▪ North American a keen promoter of a person, organization, or cause.
   • 5. North American informal a shoplifter.

   booster cable

   • n.
     another term for jumper cable

   Oxford American Dictionary

   morale booster

   • n.
     an event, occurrence, or saying which raises morale: the first Test win was a real morale booster

   Oxford Dictionary

   booster seat

   • n.
     an extra seat or cushion placed on an existing seat for a small child to sit on.

   Oxford Dictionary

   booster seat

   • n.
     an extra seat or cushion placed on an existing seat for a small child to sit on.

   Oxford American Dictionary

3. • 更多解釋

   booster

   • IPA[ˈbo͞ostər]

   美式

   • n.
     a keen promoter of a person, organization, or cause: athletic booster clubs

   Oxford American Dictionary