Real Dictionary

sink
People use sink school or sink estate to refer to a school or housing estate that is in a very poor area with few resources.
countable noun: A sink is a large fixed container in a kitchen, with taps to supply water. It is mainly used for washing dishes.
countable noun: A sink is the same as a washbasin or , basin.
verb: If a boat sinks or if someone or something sinks it, it disappears below the surface of a mass of water.
verb: If someone sinks a number of alcoholic drinks, they drink them quickly.
verb: If someone sinks a well, mine, or other large hole, they make a deep hole in the ground, usually by digging or drilling.
verb: If something sharp sinks or is sunk into something solid, it goes deeply into it.
verb: If something sinks to a lower level or standard, it falls to that level or standard.
verb: If something sinks, it disappears below the surface of a mass of water.
verb: If something sinks, it moves slowly downwards.
verb: If you sink money into a business or project, you spend money on it in the hope of making more money.
verb: If you sink, you move into a lower position, for example by sitting down in a chair or kneeling.
verb: If your heart or your spirits sink, you become depressed or lose hope.
verb: If your voice sinks, it becomes quieter.
verb: In golf, snooker, and some other games, if you sink a ball or a putt, you successfully hit the ball into a hole.
verb: To sink into an unpleasant or undesirable mood, situation, or state means to pass gradually into it.

sink in American English
to go beneath the surface of water, deep snow, soft ground, etc. so as to be partly or completely covered

sink in American Englishoften
intransitive verb: to displace part of the volume of a supporting substance or object and become totally or partially submerged or enveloped; fall or descend into or below the surface or to the bottom
transitive verb: to cause to become submerged or enveloped; force into or below the surface; cause to plunge in or down

sink in British English
verb: to descend or cause to descend, esp beneath the surface of a liquid or soft substance