lock away

phrasal verb

locked away; locking away; locks away

1

: to put (something) in a locked container, place, etc.

The jewelry was locked away in a cabinet.

2

: to put (someone) in a locked place (such as a prison) for a long period of time

lock away a criminal

The state locked their sister away in a psychiatric hospital.

3

: to keep (oneself) alone in a room or place for a long period of time

He locked himself away in his room while he studied.

He was locked away in his room while he studied.