also: ハイチェアー
noun
tall chair; bar stool
Refers to a tall chair used at counters or bars, not specifically for children.
カウンターでハイチェアに座って食事をした。
I ate sitting on a tall chair at the counter.
バーでハイチェアに腰掛けてカクテルを飲んだ。
I sat on a bar stool at the bar and drank a cocktail.
noun
Specifically a child's high chair for feeding; compare with ベビーチェア.
See also: ベビーチェア
赤ちゃんをハイチェアに座らせて離乳食をあげた。
I put the baby in the high chair and fed them baby food.
ベビーチェア is a baby chair, often lower and for general use, while ハイチェア in sense 2 specifically refers to a tall feeding chair for infants.
Loanword from English 'high chair'.