put away

1.  Place in a designated spot for storage; also, place out of reach. For example, Please put away your clothes, or This young tennis player can really put away the ball. Also see set aside, def. 1.
2.  Renounce, discard, as in Put away all those negative thoughts. [Late 1300s]
3.  Consume quickly, ingest readily, as in He put away his dinner in just a few minutes. [Colloquial; late 1800s]
4.  Confine to a mental health facility, as in The doctor said we had to put her away. [Colloquial; late 1800s]
5.  Kill, as in The vet put our old cat away. [Colloquial; late 1500s]

Definition: consume
Antonyms: abstain, refrain

v

Definition: incarcerate
Antonyms: free, liberate

v

Definition: kill
Antonyms: give birth

The verb has 6 meanings:

Meaning #1: place in a place where something cannot be removed or someone cannot escape
  Synonyms: lock in, lock away, lock, shut up, shut away, lock up

Meaning #2: throw or cast away
  Synonyms: discard, fling, toss, toss out, toss away, chuck out, cast aside, dispose, throw out, cast out, throw away, cast away

Meaning #3: lock up or confine, in or as in a jail
  Synonyms: imprison, incarcerate, lag, immure, put behind bars, jail, jug, gaol, remand

Meaning #4: kill gently, as with an injection, as of pet animals
  Synonym: put to sleep

Meaning #5: eat up; usually refers to a considerable quantity of food
  Synonyms: tuck in, tuck away

Meaning #6: turn away from and put aside, perhaps temporarily