Definition of booster in US English:



  • 1North American A keen promoter of a person, organization, or cause.

    as modifier ‘athletic booster clubs’
    • ‘In fact, if it weren't for parental involvement as sponsors, coaches, booster club participants, etc. most programs would not even survive.’
    • ‘Edward DiLoreto, who owns a local engineering firm, wanted to buy the $400 ad to benefit the Downey High School baseball booster club.’
    • ‘All this information was easily available - on the Internet, from the U.S. Internal Revenue Service, even from the booster club officers themselves.’
    • ‘While both impoverished and wealthy school districts dine on the booster clubs' cash cow, a handful of local educators say it's time their teams went on a diet.’
    • ‘The university is clamping down on media access during his summer booster club tour, and publicity flacks are shielding the most available man in college football.’
    • ‘How will you include parents, booster club, and students?’
    • ‘In the early twentieth century, booster organizations that favored particular water projects proliferated.’
    • ‘In a country where it is illegal to organize many types of public meetings, fans formed booster clubs and canvassed malls to court prospective voters.’
    • ‘With a stipend in place, coaches and athletic administrators wouldn't be burdened with monitoring for potential abuses by school alumni and/or booster club members.’
    • ‘Gender inequity, powerful booster clubs, low athlete graduation rates, and violations of rules governing recruiting and academic standards are common.’
    • ‘Some of those teammates have been waiting to see him dominate a game as long as the various booster clubs, Internet sites and talk-show guys.’
    • ‘‘It's like night and day,’ says the booster club president.’
    • ‘The sport receives considerably more cash, due to its own publicly based booster club.’
    • ‘A garden club or a booster club for your children's sports/activities?’
    • ‘The U.S. Internal Revenue Service requires booster clubs spending $25,000 or more a year to seek a tax exemption.’
    • ‘That's kind of like the college football coach going to a booster club meeting and telling a joke about the rival school.’
    • ‘In total, you'll probably pony up about $35 through the year for booster club functions or other events, totaling $700.’
    • ‘Schools with great booster clubs don't like the program because of the conflicts that can arise between their sponsors and the ads the 3rd party sells.’
    advocate, proponent, promoter, proposer, supporter, standard-bearer, torch-bearer, defender, protector, upholder, backer, exponent, patron, sponsor, prime mover
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  • 2in combination A source of help or encouragement.

    ‘job fairs are a great morale booster’
  • 3Medicine
    A dose of an immunizing agent increasing or renewing the effect of an earlier one.

    • ‘Dr. Robbins said that efforts to increase the efficacy of the vaccines will include studies on the effectiveness of a booster dose of the vaccine given one year later.’
    • ‘Firstly, the patient should be asked whether they have received a full course of tetanus vaccine and when they last received a booster injection.’
    • ‘Delaying vaccination until 15 months of age or adding a booster vaccination might solve this problem.’
    • ‘Young children who have not received all five doses of the vaccine may require a booster dose if exposed to an infected family member.’
    • ‘I had a booster vaccination last year, needed every ten years.’
    inoculation, vaccination, vaccine, immunization, dose
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  • 4The first stage of a rocket or spacecraft, used to give initial acceleration.

    • ‘However, the booster rocket that launched it also reached orbit, and this was easily visible from the Earth.’
    • ‘The collective impact of such mythologies has been horrifying; the same booster that launched Sputnik is still the one most used.’
    • ‘The camera will be turned on fifteen minutes prior to launch and will show the orbiter and solid rocket boosters on the launch pad.’
    • ‘The two solid rocket boosters separate from the shuttle about two minutes after launch, after which the main engines take over completely.’
    • ‘Rockets that use solid propellants, such as the space shuttle's solid rocket boosters, arrive with the propellant already stored inside them in a puttylike form.’
    • ‘The launch was delayed again because of a booster rocket problem.’
    • ‘‘When the rocket boosters launch, you're in for the ride of your life,’ Walheim said.’
    • ‘In the first scenario, personal spaceflight will use lower-cost versions of classic boosters and spacecraft.’
    • ‘The proposed system is supposed to intercept intercontinental ballistic missiles minutes after launch, while their rocket boosters are still burning.’
    • ‘The two booster rockets flanking the space shuttle's liquid-fuel engine run on solid propellant.’
    • ‘The rockets are called the shuttle's solid rocket boosters because they contain solid, as opposed to liquid, propellant.’
    • ‘The loss of another shuttle, Challenger, in 1986, along with another seven astronauts, was eventually officially attributed to a leaky booster rocket.’
    • ‘The long, relatively thin rockets flanking the Space Shuttle are solid rocket boosters.’
    • ‘It was designed to be fired from a short mobile launcher by means of two solid-fueled rocket boosters.’
    • ‘The inability of both companies to launch rocket boosters on time certainly does not bode well.’
    • ‘The ground crews will also be monitoring the performance of the orbiter, solid rocket boosters and ground system while the tank is filled with the ultra-cold liquids.’
    • ‘The most reliable rockets thus far designed have been the Apollo Saturn lunar boosters and the space shuttles.’
    • ‘It should be capable of saving the passengers even if the booster rocket launching it fails.’
    • ‘The air vehicle's engines are started and it is launched from the container by a booster rocket.’
    • ‘On the view screen the main booster separated from the rocket and the image began to fade.’
  • 5A device for increasing electrical voltage or signal strength.

    • ‘Among the items stolen was a green Ford Escort 1.8, a battery charger, a battery booster, a Toshiba laptop computer and two children's motorbikes.’
    • ‘Antenna booster for areas with weak signals are another good choice.’
    • ‘They are a signal booster that allows you to duplicate tapes with minimal loss of quality.’
    • ‘They both protrude about the same distance from the side of your notebook, but at first I thought that the phone card didn't have a connector for a booster antenna.’
    • ‘Within each subsector, the capacity booster dynamically selects the best lobe to handle a call.’
    • ‘A booster circuit uses a source voltage to generate a boosted voltage that is higher than the source voltage.’
    • ‘We'll be looking at repeaters and signal boosters as ways to keep signal strength high and excessive protocol chatter low.’
    • ‘They have now agreed to pay for a TV-signal booster to improve reception.’
    • ‘It can be easily increased with a long antenna and a booster or car unit (for additional dollars).’
    • ‘He is also calling for planning permission to be required for all but the tiniest signal boosters and public consultation be improved.’
    • ‘Even if gaming boosters are still ahead of the curve in the United States, interactive gaming on television is already a huge success - in Europe.’
    • ‘The crime he committed has nothing to do with having an antenna booster, but that doesn't stop the reporter from talking about WiFi networks.’
    • ‘They offer expensive hi-tech gadgets as free gifts in return for spending £20 or similar on a low-value product such as a mobile telephone signal booster.’
    • ‘Antenna boosters help to strengthen the signal between a cell tower and your phone.’
    • ‘The 43-year-old civil servant has lost alarm clocks, television boosters, a microwave and a stereo.’
  • 6North American informal A shoplifter.