1. (

• sink

) plumbing fixture consisting of a water basin fixed to a wall or floor and having a drainpipe ;

2. (

• sink

) (technology) a process that acts to absorb or remove energy or a substance from a system; "the ocean is a sink for carbon dioxide" ;

3. (

• sinkhole ,
• sink ,
• swallow_hole

) a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof ;

4. (

• cesspool ,
• cesspit ,
• sink ,
• sump ,

) a covered cistern; waste water and sewage flow into it ;

1. (

• sink ,
• drop ,
• drop_down

) fall or descend to a lower place or level; "He sank to his knees" ;

2. (

• sink ,

) cause to sink; "The Japanese sank American ships in Pearl Harbor" ;

3. (

• sink ,
• pass ,
• lapse ,

) pass into a specified state or condition; "He sank into nirvana" ;

4. (

• sink ,
• settle ,
• go_down ,
• go_under

) go under; "The raft sank and its occupants drowned" ;

5. (

• sink ,
• subside ,

) descend into or as if into some soft substance or place; "He sank into bed"; "She subsided into the chair" ;

6. (

• dip ,
• sink ,

) appear to move downward; "The sun dipped below the horizon"; "The setting sun sank below the tree line" ;

7. (

• slump ,
• fall_off ,
• sink

) fall heavily or suddenly; decline markedly; "The real estate market fell off" ;

8. (

• slump ,
• slide_down ,
• sink ,

) fall or sink heavily; "He slumped onto the couch"; "My spirits sank" ;

9. (

• bury ,
• sink

) embed deeply; "She sank her fingers into the soft sand"; "He buried his head in her lap" ;