Definition

To make a sound by hitting something, often to get attention or to signal someone.

Example

She knocked on the door to let them know she had arrived.

Tense Forms

Conversation

Did you hear someone knock on the door earlier?

Yeah, I thought it was just the wind at first.

No, I definitely heard a knock again just now.

Maybe we should check who it is.

Synonyms & Antonyms

Definition

A sound made by hitting a hard surface, often described as a tap or rap.

Example

I heard a knock at the door.

Conversation

Did you hear that knock on the door just now?

Yeah, it was pretty loud!

I wonder who it could be at this hour.

Definition

To hit something with force, usually to make a sound or to cause damage.

Example

She knocked on the door to get their attention.

Tense Forms

Conversation

Did you hear that loud sound outside?

Yeah, it sounded like someone might have knocked into something.

I hope no one got hurt; it was really loud!

Root Explanation

The word 'knock' originates from Old English 'cnoccan', meaning to strike or hit. It describes the action of striking a surface to make a sound, typically to gain attention.

Memory Tip

Think of the Old English word 'cnoccan' which means to strike — that's why 'knock' refers to the action of striking a door to get someone's attention.

Visually Confused Words