画家 (huàjiā) is a noun meaning "painter" or "artist." It specifically refers to someone who paints as a profession or vocation, and follows the common Chinese word-formation pattern of skill + 家 (expert/specialist).
这位画家的作品在国际上很有名。
Zhè wèi huàjiā de zuòpǐn zài guójì shàng hěn yǒumíng.
This painter's works are very famous internationally.
他从小就想当一名画家。
Tā cóng xiǎo jiù xiǎng dāng yì míng huàjiā.
He has wanted to be a painter since he was little.
展览馆里展出了好几位画家的油画。
Zhǎnlǎnguǎn lǐ zhǎnchū le hǎo jǐ wèi huàjiā de yóuhuà.
The exhibition hall is displaying oil paintings by several painters.