A painter or artist — someone whose profession or skill is painting (oil, watercolor, drawing, etc.).
彼は抽象画で知られる画家だ。
He is a painter known for abstract works.
その画家の個展に行って新作を見た。
I went to the painter's solo exhibition and saw new works.
彼女は画家になるために美術学校に通った。
She attended art school to become a painter.