: to go down below the surface of water, mud, etc.
: to cause (a ship or boat) to go down below the surface of water
: to move down to a lower position
: a wide bowl that has a faucet for water and a drain at the bottom and is usually positioned in a counter or on a pedestal
What made you want to look up sink? Please tell us where you read or heard it (including the quote, if possible).