← BackshareGuesscumuliform/ˈkjuːmjəlɪfɔːrm/adjectiveHaving a rounded, puffy shape like a cumulus cloud.The pillow had a cumuliform appearance, soft and billowy.The artist painted cumuliform clouds drifting across the blue sky.Cumuliform shapes are common in many types of storm clouds.Synonymsroundedpuffy