intransitive verb
Definition: To be on fire or to produce flames; to be consumed by fire.
Example: The dry leaves began to burn quickly in the hot sun.
noun
Definition: A mark or injury caused by fire, heat, or chemicals, or a feeling of pain from heat or irritation.
Example: She had a burn on her arm from touching the hot stove.
transitive verb
Definition: To cause something to be destroyed or damaged by fire or heat.
Example: He accidentally burned the toast while making breakfast.