:to laugh inwardly or quietly
- He chuckled as he read the comic strip.
:to make a continuous gentle sound resembling suppressed (see suppress 5a) mirth
- the clear bright water chuckled over gravel
- —B. A. Williams
:to utter with a chuckle
- Templeton grinned. "I'll tend to this," he chuckled. He took Wilbur's tail in his mouth and bit it …. The pain revived Wilbur.
- —E. B. White