Definition

1. Noun:
   • An additional dose that makes sure the first dose was effective: A supplementary dose of a vaccine or medication given to strengthen or renew the initial immunization or treatment.
   • The first stage of a multistage rocket: A rocket engine or a self-contained section of a rocket that provides initial thrust and is then jettisoned.
   • An amplifier for restoring the strength of a transmitted signal: A device, especially in electronics or telecommunications, used to increase the power or amplitude of a signal.
   • A thief who steals goods that are in a store: A shoplifter; someone who steals merchandise from retail establishments.
   • Someone who is an active supporter and advocate: A person who enthusiastically promotes, supports, or champions a cause, person, or activity.
   • A person who backs a politician or a team etc.: A supporter or fan.

Examples of Usage

• Noun:
  • I got my flu booster shot this morning. (Referring to an additional vaccine dose.)
  • The rocket's booster separated successfully two minutes after launch. (Referring to a rocket stage.)
  • We installed a signal booster to improve the cell phone reception in the building. (Referring to an amplifier.)
  • The store installed new cameras to catch boosters. (Referring to a shoplifter.)
  • She has been a real booster for the local arts scene. (Referring to an active supporter.)
  • He's a loyal booster of the university's football team. (Referring to a fan or backer.)

Advanced Usage

• "Booster seat": A special car seat for a young child that raises them to a height where the adult seat belt fits correctly.

  • Your child should use a booster seat until they are tall enough for the regular seat belt.

• "Booster club": An organization that provides support, often financial, for a sports team or other group.

  • The school's booster club raised money for new team uniforms.

Variants and Related Words

• Boost (verb): To help or encourage something to increase or improve.
  • The new campaign aims to boost sales.
• Boosterism (noun): The active promotion of a city, organization, etc.
  • The mayor's speech was full of civic boosterism.

Synonyms

• Supporter: A person who approves of and encourages someone or something.
• Promoter: A person or company that finances or organizes an event.
• Amplifier: An electronic device that strengthens signals.
• Shoplifter: A person who steals goods from a store.

Related Phrasal Verbs/Compounds

• Boost up: To lift or raise someone or something; to encourage.
  • Can you boost me up so I can see over the fence?
  • We need to boost up team morale.

Related Idioms

• A shot in the arm / A booster shot: Something that has a sudden, strong, positive effect on something.
  • The new investment was a real booster shot for the local economy.

Noun

1. an additional dose that makes sure the first dose was effective
2. the first stage of a multistage rocket
3. an amplifier for restoring the strength of a transmitted signal
4. a thief who steals goods that are in a store
5. someone who is an active supporter and advocate
6. a person who backs a politician or a team etc.
   • all their supporters came out for the game
   • they are friends of the library