intransitive verb
Definition: To make a sharp, abrupt sound, often caused by two hard objects hitting each other.
Example: The horse's hooves clack against the pavement as it trots down the street.
noun
Definition: A sharp, quick sound made by two hard objects hitting each other, often repeated.
Example: The clack of the typewriter filled the quiet room.
transitive verb
Definition: To make a sharp, abrupt sound, often by striking two objects together.
Example: She clacked the two pieces of wood together to get his attention.