burn down is a verb meaning "burn completely; be consumed or destroyed by fire". It carries 2 recorded senses.
burn completely; be consumed or destroyed by fire
“The hut burned down”
“The mountain of paper went up in flames”
destroy by fire
“They burned the house and his diaries”
Definitions, synonyms and semantic relations for burn down come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.