The meaning of drain is to draw off (liquid) gradually or completely To draw off (a liquid) by a gradual process. How to use drain in a sentence.
If you drain something, you remove the liquid from it, usually by pouring it away or allowing it to flow away, and if something drains, liquid flows away or out of it: The vortex is a spinning, cyclonic mass of fluid, which can be observed in the rotation of water going down a drain, as well as in smoke rings, tornados and hurricanes. Look up drain in wiktionary, the free dictionary.
Learn how to clean a sink drain using baking soda and vinegar (no chemicals!) so it smells fresh and drains well. To or into the condition of being wasted or lost All of our best laid plans are down the drain. To withdraw or draw off (a liquid) gradually
Remove slowly or by degrees, as by filtration. See examples of drain used in a sentence. To empty by drawing off liquid [~ + object] to drain a swamp
[no object] the crankcase has to drain before you put on the new filter.