booster seat

noun

: a portable seat that is placed on or attached to a chair or an automobile seat in order to raise a child to a higher position

… they should use a booster seat until they are 8 years old or at least 4 feet, 9 inches tall. Only after that can they ride in the front seat, and even then the back is always safer.

—Denise Milosevich

She's too big for a high chair, but needs to sit on her knees to keep her head fully above the dining room table. And she doesn't want a booster seat. She'll boost herself, thank you very much.

—Dave Manley

called also booster chair

Examples of booster seat in a Sentence

Recent Examples on the Web

Also at the time, a 5- and 6-year-old were not in booster seats or seat belted, the citation said. —Mara H. Gottfried, Twin Cities, 22 Sep. 2025

No booster seats were located in the vehicle. —Caroline Zimmerman, Kansas City Star, 17 Sep. 2025

No passengers in car seats or booster seats will be allowed. —Ut Community Press, San Diego Union-Tribune, 9 Sep. 2025

When used correctly, car seats, booster seats, and seat belts protect young passengers. —Tanya Mohn, Forbes.com, 6 Sep. 2025

Word History

First Known Use

1954, in the meaning defined above

Rhymes for booster seat

• bittersweet
• celestite
• incomplete
• indiscreet
• marguerite
• obsolete
• overeat
• overheat
• parakeet
• stillingfleet
• superheat
• amit