“Knock” means to hit a door, wall, or other surface with your hand or something hard, usually to get someone’s attention. It can also mean to make a sound by hitting something lightly.
People usually say “knock” when they talk about knocking on a door before entering a room or house. It can also be used in everyday speech for things like knocking over a glass, knocking on wood for luck, or knocking someone’s idea. The meaning depends on the situation.
Meaning & Usage
In daily English, “knock” is most often used for the action of tapping a door to let someone know you are there. It can also mean to hit something by accident, or to criticize something in a casual way.
Examples
“Please knock before you come in.”
“I knocked over my coffee.”
“She knocked on the door three times.”
What does “knock on the door” mean?
It means to hit the door with your hand or knuckles to get someone’s attention before entering.
Can “knock” mean something else?
Yes. It can also mean to hit something by accident, or to say something negative about a person or idea.
Is “knock” a common word?
Yes, it is very common in everyday English, especially when talking about doors and small accidents.
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