simple past tense and past participle of burn
"The old wooden fence was completely burnt during last night's storm."
In plain English: To burn something means to cook it by applying heat until it turns black and tastes bad.
"The toast burnt because I left it in too long."
destroyed or badly damaged by fire
"a row of burned houses"
"a charred bit of burnt wood"
"a burned-over site in the forest"
"barricaded the street with burnt-out cars"
Damaged or injured by fire or heat.
"The firefighter rushed to save the cat trapped in the burnt house after the kitchen caught fire."
In plain English: Burnt means something has been cooked by fire until it is black and tastes bad.
"The burnt toast had a bitter taste that was hard to swallow."
Burnt comes from the word burn with the addition of the suffix -t. This form indicates that something has been subjected to the action of burning.