plumbing fixture consisting of a water basin fixed to a wall or floor and having a drainpipe
"She reached over to turn on the faucet at the kitchen sink to wash her hands."
(technology) a process that acts to absorb or remove energy or a substance from a system
"the ocean is a sink for carbon dioxide"
a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof
"During our hike through the karst region, we stepped carefully over a deep sink that opened into an underground cavern."
A basin used for holding water for washing.
"She reached over to fill the kitchen sink with warm, soapy water before starting her dishes."
In plain English: A sink is a basin with a faucet that you use for washing dishes and hands.
"He reached for the sponge to dry off his hands after they had used the sink."
To move or be moved into something.
"The small boat began to sink lower into the choppy waves as more water rushed in."
To descend or submerge (or to cause to do so) into a liquid or similar substance.
"The heavy stone sank rapidly into the deep blue water."
In plain English: To sink means to go down into something, usually because it is heavy or not strong enough to hold you up.
"I had to take out the trash because it was starting to sink in the garbage bin."
Usage: Use "sink" when an object descends below the surface of a liquid, such as a ship sinking in water. Do not confuse this with "dip," which implies only partial submersion without necessarily going beneath the top layer.
A surname.
"The Sink family has lived in that valley for generations."
Sink comes from the Old English word sincan, which traces back to a Proto-Indo-European root meaning "to fall." The modern verb entered Middle English with this same core sense of descending or going down into something.