Lock in

The dog won't escape now we've locked him in.

The dog won't escape now we've locked him in the kitchen.

I've locked in a rate of 5%.

I've got a 5% rate locked in.

Our new foil packets keep the flavour of the crisps locked in.

Companies find various ways to try to lock in a customer base by preventing the products or services from being fully fungible.

I need to lock in for this exam I'm taking tomorrow.

The missile's path is now locked in.

The best ride of the day was one that Robert got - really locked in, screaming at the top of his lungs.