1. a type of thick, white, fluffy cloud with a flat base and rounded top
Usage: meteorology
2. a heap or pile of something
Usage: formal

Examples

• The cumulus clouds drifted lazily across the blue sky.
• Pilots often use cumulus formations to identify areas of turbulence.
• Fair weather is typically associated with scattered cumulus clouds.
• The meteorologist pointed to the cumulus on the weather map.
• A cumulus of evidence supported the scientist’s theory.
• The cumulus of snow grew larger as the storm continued.