What does "storm cloud" mean?

A dark and ominous cloud that appears to indicate a coming storm.

What is a synonym for "storm cloud"?

Common synonyms include: cirrus, cloudland, cocktail, cumulus, mushroom cloud, nimbus.

noun

noun ·Rare ·Advanced level

Noun

1
A dark and ominous cloud that appears to indicate a coming storm.
"Uncertainty hangs over the industry like a storm cloud on a summer's day, preventing long-term planning and investment."
2
a heavy dark cloud presaging rain or a storm wordnet
3
A sign that serious trouble, conflict, or misfortune is approaching. broadly, figuratively

"Uncertainty hangs over the industry like a storm cloud on a summer's day, preventing long-term planning and investment."