Umbrella

Cloth-covered frame used for protection against rain or sun.

"Quick, grab that umbrella before you get rained on!"

Generally, anything that provides protection.

"The fighters provide a defensive air umbrella over the battle group."

Something that covers a wide range of concepts, purposes, groups, etc.

"The test facility was established under the umbrella of the company's quality program."

The main body of a jellyfish, excluding the tentacles.

"Jellyfish are composed of more than 90% water and most of their umbrella mass is made up of gelatinous material."

To cover or protect, as if by an umbrella.

To form the dome shape of an open umbrella.

To move like a jellyfish.