Refers to a device that produces a flame or heat, such as a gas burner, laboratory burner, or camping stove burner.
ガスバーナーで試験管を加熱した。
I heated the test tube with a gas burner.
キャンプ用のバーナーを買った。
I bought a burner for camping.
I lit the burner while camping and boiled some water.
The chef seared the surface of the steak with a burner.
The wind was strong, and the burner's flame went out.