Definition of Knock

to hit a surface in a noisy way

Examples of Knock in a sentence

You must knock loudly on the door when you go to grandmother’s house since she is hard of hearing.  🔊

A metal part of the car’s engine began to knock violently right before the vehicle broke down.  🔊

In order to alert the owners of a home to your presence outside, it is recommended that you knock on their door.  🔊

Because Gerald was clearly focused on his work, I chose to knock on the doorframe of his open office to let him know someone was there.  🔊

The rowdy members of my class often knock on the wall at the back of the room in an effort to disrupt whatever is happening in our neighboring classroom.  🔊

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