an injury caused by exposure to heat or chemicals or radiation
"She had to cover her skin immediately after accidentally dropping boiling water on herself, resulting in a painful burn."
damage inflicted by fire
"The hikers rushed to help their companion after his leg was badly burned when he fell into a campfire."
A physical injury caused by heat, cold, electricity, radiation or caustic chemicals.
"The hikers crossed the narrow burn that cut through the forest floor."
A stream.
In plain English: A burn is an injury to your skin caused by heat, electricity, or chemicals.
"The fire left a painful burn on his arm."
Usage: Do not use "burn" as a noun to mean a stream; this is an archaic or dialectal usage that has fallen out of standard English. Instead, reserve the noun form for physical injuries caused by heat or fire, such as a sunburn or a kitchen burn.
feel strong emotion, especially anger or passion
"She was burning with anger"
"He was burning to try out his new skies"
To cause to be consumed by fire.
"The intense heat from the wildfire burned down the entire forest in just a few hours."
In plain English: To burn something means to damage it by exposing it to fire or extreme heat until it catches fire or turns into ash.
"The fire was burning brightly in the fireplace."
Usage: Use "burn" when describing something that is being destroyed or damaged by fire or intense heat. Do not use it to mean cooking food unless you specifically want to imply the food has been overcooked or charred.
A village and civil parish in Selby district, North Yorkshire, England (OS grid ref SE5928).
"We drove through Burn to catch a glimpse of the historic church before continuing our journey along the A64."
The word "burn" comes from Old English birnan, which originally meant to set something on fire. It traveled into modern English through Middle English after undergoing a sound shift known as metathesis.