(Irregular preterit, past participle: sank, sunk).
1. To cause to sink.
2. To descend into some soft substance.
3. To fall or drop to a lower place or level; SYN. drop, drop down.
4. To go under,; SYN. settle, go down, go under.
5. To pass into a specified state or condition; SYN. pass, lapse.

ETYM Western U. S.
A water basin fixed to a wall or floor and having a drainpipe.

A device or part of a device that receives something from another device. See also data sink, heat sink.