also: あたまがよい
expression, i-adjective (yoi/ii class)
bright; intelligent; clever; smart
Describes a person who is intellectually sharp or quick-witted. Often used in casual conversation. The antonym is 頭が悪い.
Antonyms: 頭が悪い
彼は本当に頭がいいから、すぐに理解する。
He's really bright, so he understands right away.
You can't succeed just by being smart.
Compound of 頭 (atama, 'head') + が (ga, subject marker) + いい (ii, 'good'). Literally 'head is good', an idiomatic expression for intelligence.