1. counterdrain - Noun
2. counterdrain - Verb
A drain at the foot of the embankment of a canal or watercourse, for carrying off the water that may soak through.
(surgery) An inserted device or other means by which excess fluid is drained off from a part of the body in which it accumulates.
counterdrain (third-person singular simple present counterdrains, present participle counterdraining, simple past and past participle counterdrained)
(surgery) To drain off excess fluid from a part of the body in which it accumulates.