1. To cause or to collapse into a state of partial or total destruction, decay, or disrepair: Many homes and buildings have been dilapidated by the fires that took place in Tom's neighborhood and beyond into an extended geographical area.
2. Etymology: from Latin dilapidare, "to demolish, to destroy"; from di-, dis', "apart" + lapidare, "to throw stones"; from lapis, lapid-, "stone".