to keep someone in (or out), using a blockade, especially ships in a port
to close or block a road etc., using a barricade
A barrier constructed across a road, especially as a military defence
An obstacle, barrier, or bulwark.
A place of confrontation.
To secure with rope, string, etc.
To occupy, detain, keep busy, or delay.
To immobilize a capital: make a capital investment that makes that capital unavailable.
To complete, finish, or resolve.
Don't forget to tie up your hair before you bake.