To cause something to fall into a state of disrepair or ruin. The harsh weather conditions began to dilapidate the old barn, leaving it in a sorry state.
To fall into a state of disrepair or ruin. Over the decades, the abandoned mansion began to dilapidate without maintenance.
(archaic) To squander or waste, especially of property or resources. He dilapidated his inheritance within a year on frivolous pursuits.