| Noun | 1. | drain - emptying accomplished by draining | |
| 2. | drain - tube inserted into a body cavity (as during surgery) to remove unwanted materialtube, tubing - conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases surgery - the branch of medical science that treats disease or injury by operative procedures; "he is professor of surgery at the Harvard Medical School" | |
| 3. | drain - a pipe through which liquid is carried awayculvert - a transverse and totally enclosed drain under a road or railway pipage, pipe, piping - a long tube made of metal or plastic that is used to carry water or oil or gas etc. scupper - drain that allows water on the deck of a vessel to flow overboard soil pipe - drain that conveys liquid waste from toilets, etc. trap - drain consisting of a U-shaped section of drainpipe that holds liquid and so prevents a return flow of sewer gas | |
| 4. | drain - a gradual depletion of energy or resources; "a drain on resources"; "a drain of young talent by emmigration"depletion - the act of decreasing something markedly drawing off, drawing - act of getting or draining something such as electricity or a liquid from a source; "the drawing of water from the well" brain drain - depletion or loss of intellectual and technical personnel | |
| Verb | 1. | drain - flow off gradually; "The rain water drains into this big vat"course, flow, run, feed - move along, of liquids; "Water flowed into the cave"; "the Missouri feeds into the Mississippi" | |
| 2. | drain - deplete of resources; "The exercise class drains me of energy" | |
| 3. | drain - empty of liquid; drain the liquid from; "We drained the oil tank"empty - make void or empty of contents; "Empty the box"; "The alarm emptied the building" | |
| 4. | drain - make weak; "Life in the camp drained him"weaken - lessen the strength of; "The fever weakened his body" | |