v.1. To demolish something; raze something: The city tore down the old warehouses. I put up posters, but my opponents tore them down.
2. To take something apart; disassemble something: The mechanic tore down the engine. We took out the motor and tore it down to find out what was wrong with it.
3. To make vicious and damaging statements about someone or something; denigrate someone or something: The speakers tried to change the audience's opinion, but the audience tore the speakers down.