umbrella -- (a lightweight handheld collapsible canopy)
umbrella -- (a formation of military planes maintained over ground operations or targets; "an air umbrella over England")
umbrella -- (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")
Overview of adj umbrella
The adj umbrella has 1 sense
umbrella -- (covering or applying simultaneously to a number of similar items or elements or groups; "an umbrella organization"; "umbrella insurance coverage")