• noun:   plumbing fixture consisting of a water basin fixed to a wall or floor and having a drainpipe
• noun:   (technology) a process that acts to absorb or remove energy or a substance from a system

  Example: "The ocean is a sink for carbon dioxide"

• noun:   a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof
• noun:   a covered cistern; waste water and sewage flow into it
• verb:   descend into or as if into some soft substance or place
• verb:   pass into a specified state or condition
• verb:   fall or drop to a lower place or level
• verb:   cause to sink
• verb:   go under, "The raft sank and its occupants drowned"
• verb:   appear to move downward
• verb:   embed deeply
• verb:   fall heavily or suddenly; decline markedly
• verb:   fall or sink heavily
• name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #5852)

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