booster
- 01 B2 Upper Intermediate
n.an extra dose of a vaccine given to keep the protection working.
n.an additional dose of a vaccine or immunising agent administered to maintain or increase the level of immunity.
Simple“The doctor recommended a booster before I travelled to a country with high infection rates.”
In context“Public health officials debated the optimal timing for the booster to ensure maximum antibody response across the elderly population.”
UsageOften used as a compound noun: 'booster shot'.
Synonymsbooster shotre vaccination - 02 B2 Upper Intermediate
n.the first part of a rocket that provides the power to lift off.
n.the initial stage of a multistage rocket or an auxiliary engine providing supplemental thrust during liftoff.
Simple“The rocket's boosters fell away into the ocean once the craft reached the upper atmosphere.”
In context“Engineers monitored the solid rocket boosters closely during the first two minutes of flight to ensure the trajectory remained within safety parameters.”
Synonymsthrusterrocket motor - 03 C1 Advanced
n.someone who actively supports or promotes a team, school, or person.
n.an enthusiastic supporter or promoter of a specific cause, institution, or individual.
Simple“The local business boosters raised money to renovate the high school football field.”
In context“As a lifelong booster of the university's arts programme, she donated a significant portion of her estate to the new gallery.”
Teacher's tipIn the US, this often refers specifically to members of a 'booster club' who raise money for school sports.
- 04 B2 Upper Intermediate
n.a small seat placed on a chair or car seat to help a child sit higher.
n.a removable seat used to raise a child to a height where they can sit at a table or safely use a car seatbelt.
Simple“The restaurant provided a booster so the toddler could reach the table.”
In context“Safety regulations require children of a certain height to remain in a booster until the vehicle's shoulder belt fits them correctly.”
Synonymsbooster seat - 05 C2 Proficiency
n.a word like 'very' or 'extremely' that makes another word stronger.
n.a lexical item used to amplify or strengthen the force of an utterance.
Simple“In the sentence 'I am so happy', the word 'so' acts as a booster.”
In context“The researcher analysed the frequency of boosters in persuasive writing to determine how they influenced the reader's perception of authority.”
- 06 C2 Proficiency
n.a person who steals items from a shop.
n.a person who engages in shoplifting or professional theft.
Simple“The security guard caught the booster trying to leave with three expensive jackets.”
In context“The police identified a ring of professional boosters who had been targeting high-end boutiques across the metropolitan area.”
Synonymsshoplifterthief - 07 C1 Advanced
v.to give someone an extra medical dose to keep them protected.
v.to administer a booster dose of a vaccine to an individual.
Simple“The clinic is planning to booster all the residents at the nursing home next week.”
In context“The health department aimed to booster the entire vulnerable population before the winter flu season peaked.”
Synonymsre vaccinate
“My excitement was impossible to contain and as the rocket fired its huge boosters and engines and headed skywards, my reaction went viral.”
“Earlier this month, SpaceX launched one of its reusable Falcon 9 boosters for a record-setting 35th time.”