noun
- a tall, dense cloud with a flat top that often produces thunderstorms, heavy rain, or hail
Usage: meteorology
Examples
- The cumulonimbus cloud towered high into the sky before the storm hit.
- Pilots avoid flying through cumulonimbus clouds due to severe turbulence.
- The meteorologist warned that cumulonimbus formations could bring hail.
- Lightning flashed within the dark cumulonimbus cloud.
- The cumulonimbus had the characteristic anvil shape at its top.
- Heavy rain poured from the massive cumulonimbus overhead.