Definitions

1. noun

A snake, especially a western diamondback rattlesnake, that has a distinctive rattle on its tail.

“The hikers spotted a rattler in the trail ahead and carefully avoided it.”

2. noun

A person or thing that causes trouble or commotion.

“The loudmouth in the back of the room was a real rattler, always stirring up trouble.”

3. noun

A device that emits a loud, sharp sound, especially a type of warning device used on railways.

“The train’s rattler sounded its warning as it approached the crossing.”

4. verb

To move or make a rattling sound, especially with a snake’s tail.

“The snake rattled its tail as it sensed danger.”

5. verb

To cause trouble or commotion.

“The news rattled the stock market with its unexpected announcement.”