Lock down is when we make sure all doors are locked, ... and each door to the classrooms are locked and safe.

Lock your door and keep your neighbor honest

Even if I'm taking out the trash, I lock the door. So for me, it's great.

But alas the door remained locked.

Mitsubishi has a parental lock. If that somehow gets locked up on your TV, if you don't have the remote control, you can throw the TV in the garbage.

Don't lock the stable door after the horse has been stolen