intransitive verb
Definition: To move quickly and smoothly while making a low, continuous sound like a buzz or vibration.
Example: The drone began to whir as it took off into the sky.
noun
Definition: A sound that is made by something moving quickly, often like a buzzing or vibrating noise.
Example: I could hear the whir of the fan as it cooled the room.
transitive verb
Definition: To make a low, continuous, vibrating sound, often associated with machinery or movement.
Example: The drone began to whir as it took off into the sky.