WordNet
damp-proof course
n. a course of some impermeable material laid in the foundation walls of building near the ground to prevent dampness from rising into the building [syn: damp course]
Usage examples of "damp-proof course".
He had provided a damp-proof course against rising water but Nature had beaten him, found a way in from above.
If mathematicians were building a house, they would start with the downstairs walls, hovering unsupported a foot or so above the damp-proof course .