burn to damage, injure, destroy or kill somebody/​something with fire, heat or acid; to be damaged, etc. by fire, heat or acid: She burned all his letters. The ...

[countable] an injury or a mark caused by fire, heat or acid. to have minor/severe/third-degree burns; She suffered serious burns but is expected to survive ...

burn to damage, injure, destroy, or kill something or someone with fire, heat, or acid; to be damaged, etc. · char [usually passive] to make something black by ...

an injury or a mark caused by fire, heat, or acid; minor/severe/third-degree burns; cigarette burns on the furniture; burn marks; a burn unit in a hospital.

Of fire, a furnace, or conflagration: To be in the state of activity characteristic of fire; to be in the state of combustion.

There is one meaning in OED's entry for the verb burn. See 'Meaning & use' for definition, usage, and quotation evidence. This word is now obsolete.

​(of feelings, etc.) very strong; extreme. a burning desire to win; He's always had a burning ambition to start his own business.

to be destroyed, or to destroy something, by fire. The house burned down in 1895. See burn down in the Oxford Advanced Learner's Dictionary.

burning ... 1(of feelings, etc.) very strong; extreme a burning desire to win He's always had a burning ambition to start his own business.

​to get rid of or destroy something by burning. The fire burned up 1 500 acres of farmland. ​to use calories or energy by doing exercise.