The phrasal verb "burn down" is frequently used in both informal and formal contexts, though it tends to lean more towards informal speech in everyday conversations. It generally refers to the act of a building or structure being completely destroyed by fire, with emphasis on the process leading to its collapse or ruin. In formal contexts, such as news reports or official documents, it is used to describe incidents of arson or accidental fires resulting in significant damage. "Burn down" is typically associated with negative or emergency situations, and is often used in the past tense when recounting incidents (e.g., "The warehouse burned down last night."). It implies a total loss, and can also be used metaphorically to describe the complete destruction of intangible entities, such as relationships or reputations (e.g., "The scandal burned down his career").
B1
PreIntermediate
1. To destroy or cause to be destroyed by fire, usually used for buildings or structures.
The old barn burned down in the middle of the night, leaving only ash and rubble.
Firefighters worked quickly, but unfortunately the entire warehouse burned down before they could extinguish the flames.
2. To become engulfed and consumed by fire, generally leading to complete destruction.
If we don't act immediately, this wildfire might burn down the entire forest.
The candle was left unattended, and it almost burned down the entire house.