/ ʌmˈbrelə; NAmE / noun
1.
(also BrE informal brolly ) an object with a round folding frame of long straight pieces of metal covered with material, that you use to protect yourself from the rain or from hot sun :
I put up my umbrella.
colourful beach umbrellas
—compare parasol , sunshade
2.
a thing that contains or includes many different parts or elements :
Many previously separate groups are now operating under the umbrella of a single authority.
an umbrella organization / group / fund
'Contact sports' is an umbrella term for a variety of different sports.
3.
a country or system that protects people
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WORD ORIGIN
early 17th cent.: from Italian ombrella , diminutive of ombra shade, from Latin umbra shade .