umbrella

Adjective

• covering or applying simultaneously to a number of similar items or elements or groups
  • an umbrella organization
    
  • umbrella insurance coverage
    

Noun

• 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
    

• a formation of military planes maintained over ground operations or targets
  • an air umbrella over England
    

• a lightweight handheld collapsible canopy