Synonym: admirer, booster amplifier, booster dose, booster rocket, booster shot, booster station, booster unit, champion, friend, lifter, plugger, promoter, protagonist, recall dose, relay link, relay station, relay transmitter, shoplifter, supporter, takeoff booster, takeoff rocket. Similar words: boost, foster, poster, posterity, preposterous, hostel, ostensible, ostensibly. Meaning: ['buːstə] 
n. 1. a person who backs a politician or a team etc. 2. someone who is an active supporter and advocate 3. a thief who steals goods that are in a store 4. an amplifier for restoring the strength of a transmitted signal 5. the first stage of a multistage rocket 6. an additional dose that makes sure the first dose was effective.
n. 1. a person who backs a politician or a team etc. 2. someone who is an active supporter and advocate 3. a thief who steals goods that are in a store 4. an amplifier for restoring the strength of a transmitted signal 5. the first stage of a multistage rocket 6. an additional dose that makes sure the first dose was effective. 
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(1) This win has been a great morale booster.
(2) Mail from home is a great morale booster for our soldiers.
(3) Can I bring my dog in for his booster injection?
(4) The home side badly need a confidence booster.
(5) This battery booster is a boon for photographers.
(6) She is a booster of the local girls' club.
(7) Praise is a great confidence booster.
(8) Ground controllers will then fire the booster, sending the satellite into its proper orbit.
(9) Two booster rockets will power the shuttle off the pad.
(10) a confidence/morale booster.
(11) Mail from home is a big morale booster for far-away troops.
(12) We saw the booster rockets disengage and fall into the sea.
(13) It was amazing what a morale booster her visits proved.
(14) Novelist Sinclair Lewis' Babbitt was the archetypal small-town booster.
(15) Such fairs are a great morale booster for any nurse who feels unappreciated.
(16) That kind of morale booster is infectious and they could well have won by a bigger margin.
(17) A given rocket booster could actually land more mass on these bodies than it could land on the Moon!
(18) Nova was developing in parallel as a booster capable of hurling a spacecraft to the Moon on a direct flight mission.
(19) But the upbeat, booster verve that had brought the parliament together would not be derailed. Sentencedict.com
(20) Market Booster represents Dermot Weld and is on course for the Arc.
(21) This is important-if one booster had more thrust than the other, the craft might not leave the ground vertically!
(22) However, it has kept her apprised of the booster rocket issue for more than a week.
(23) For manned lunar-landing missions, an even larger booster was required.
(24) This medicine will last for a time,but after six months you'll need a booster.
(25) He swings golf clubs created from a material used to guide the booster rockets for orbiting space ships.
(26) He brings a joy and an ebullience to his work which is a fantastic morale booster for the cast.
(27) This flyby mission could be flown on the reliable Proton booster and could be done quickly.
(28) Voice over Seeing the parachutes back in the air has been a great morale booster for the base.
(29) But in San Diego County, the economic engine known as development seems stalled as a reliable booster for an ailing economy.
(30) This pressure is maintained by means of water towers and gravity, or by booster pumping stations.
More similar words: boost, foster, poster, posterity, preposterous, hostel, ostensible, ostensibly, ostentatious, stern, ouster, sister, fester, master, oyster, mystery, cluster, plaster, western, monster, eastern, fluster, bolster, boaster, austere, cloister, yesterday, asteroid, register, youngster.