intransitive. To fall to pieces, fall into ruins; to decay.

intransitive. Of a building, structure, etc.: to collapse in fragments or ruins.

intransitive. Of a building or structure: To fall in ruins or fragments; to collapse. Also figurative.

intransitive. To fall into ruins; to crumble, collapse, esp. with a crash. Frequently figurative. Cf. ruin, v. 1a. Obsolete.

To fall into decay. Obsolete.

intransitive. To become dilapidated; to fall into ruin, decay, or disrepair.

To prove deficient upon trial. †Of fighting men: To give way (before an enemy). Of a material thing: To break down under strain or pressure (archaic…