Learner's definition of UMBRELLA
1 : a device that is used for protection from the rain and sun
◊ An umbrella consists of a circle of fabric attached to a folding frame that is connected to a central pole or handle.
2 : a group or organization that includes many smaller groups — often used before another noun 3 : something that includes several or many different things — often used before another noun
I used the heading “Odds and Ends” as an umbrella term for items that did not fit anywhere else.
I bought an umbrella policy that insures my car, jewelry, and house.