Lock Up

1. When you shut the windows and doors of a place or building.

Examples: Caroline locked up the house and forgot that she left her keys inside, now she can’t get in.
Mom always makes sure that we lock our rooms up at night just be extra safe.

2. When you intentionally put people in prison/jail or in a confined space where they can’t get out.

Examples: In the movie entitled “Carrie”, Margaret White locks her daughter up in the closet if she does something wrong.
You don’t want to get locked up. Your life will never be the same after prison.

See our complete list of English phrasal verbs.