Definition of booster seat in English:

booster seat

Syllabification: boost·er seat

noun

An extra seat or cushion placed on an existing seat for a small child to sit on.
More example sentences
  • A booster seat helps the seat belt fit better for older children who are not big enough for the safety belt alone.
  • Many parents incorrectly believe that their child is too old for a child seat or a booster seat.
  • A belt-positioning booster seat will help position the seat belts on your child's body and will fit your child until she weights about 60-80 pounds.

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Definition of booster seat in:

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Word of the day erroneous
Pronunciation: iˈrōnēəs
adjective
wrong; incorrect