What is a "high chair"? Is it an idiom?

[Sangeethy]

hi,

They wanted to make sure that their small daughter shared in the meal and so they asked the restaurant to provide a high ..........

howz using 'high seat' instead of 'high chair' b wrong???

regards
Sangeetha

[Alan]

Hi,

The accepted expression is high chair. Seat is a more general word.

Alan
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