lock
word
Definition
A lock is a device that keeps a door, box, or other object closed so that only the right key, code, or action can open it. As a verb, it means to close something securely or to become fixed so it cannot move or be opened.
Usage & Nuances
Common as both a noun and a verb. For doors, use 'lock the door' and 'unlock the door'. 'Locked' can also describe something stuck: 'The wheels locked.' In tech, 'lock your phone' is very common. Don't confuse it with 'close'—something can be closed but not locked.
Example Sentences
Please lock the door before you leave.
basic
I can't open the box because the lock is broken.
basic
She forgot to lock her bike.
basic
Did you lock the car, or should I go check?
natural
My phone locks itself after a minute.
natural
The brakes locked, and the car started to slide.
natural