1. to laugh loudly or immoderately
Usage: formal; rare

Examples

• The audience began to cachinnate at the comedian’s outrageous joke.
• She couldn’t help but cachinnate when she saw the ridiculous costume.
• The children would cachinnate whenever their teacher made a silly face.
• His tendency to cachinnate at inappropriate moments made others uncomfortable.
• The old friends cachinnated over their shared memories from college.