1. The first stage of a multistage rocket that provides initial thrust
   "The booster separated from the spacecraft after reaching the upper atmosphere";
   - booster rocket, booster unit, takeoff booster, takeoff rocket
    
2. An amplifier for restoring the strength of a transmitted signal
   "The booster amplifier improved the radio signal in remote areas"; "The TV network installed booster stations to extend coverage to rural regions";
   - booster amplifier, booster station, relay link, relay station, relay transmitter
    
3. An additional dose of a vaccine to enhance or prolong its effect
   "She received a booster of the COVID-19 vaccine six months after her initial vaccination";
   - booster dose, booster shot, recall dose
    
4. A person who backs a politician or a team etc.
   "all their boosters came out for the game";
   - supporter, protagonist, champion, admirer, friend
    
5. Someone who is an active supporter and advocate
   "He was a tireless booster for environmental causes";
   - promoter, plugger [informal]
    
6. A thief who steals goods that are in a store
   "Security cameras caught the booster hiding items in their bag";
   - shoplifter, lifter

Derived forms: boosters

Type of: adman [informal], advertiser, advertizer [US, non-standard], advocate, advocator, amp [informal], amplifier, dosage, dose, exponent, proponent, rocket, rocket engine, stealer, thief

Part of: communication equipment, communication system, multistage rocket, step rocket

Encyclopedia: Booster