Definitions

1. noun

a sudden sharp noise, typically caused by the impact of two objects

“The sound of the horses’ hooves echoed with a loud clack on the pavement.”

2. verb

to make a sudden sharp noise, typically by the impact of two objects

“The door clacked shut behind her.”

3. verb

to produce a sharp, metallic sound, typically by the movement of a key or a mechanism

“The typewriter clacked away as she typed out her story.”