umbrella

A formation of military planes maintained over ground operations or targets.

“an air umbrella over England”

A lightweight handheld collapsible canopy.

Having the function of uniting a group of similar things.

“the Democratic Party is an umbrella for many liberal groups”

“under the umbrella of capitalism”

Covering or applying simultaneously to a number of similar items or elements or groups.

“an umbrella organization”

“umbrella insurance coverage”