umbreller /ʌmˈbɹɛl.ə/ noun6 •a round cover held above the head on a long handle, to keep off rain or strong sunQuick, grab that umbrella before you get rained on! •(figurative) Anything that provides similar protection.The fighters provide a defensive air umbrella over the battle group. •(figurative) Anything that provides similar overarching coverage of a range of concepts, purposes, groups, etc.The test facility was established under the umbrella of the company's quality program. •The main body of a jellyfish, excluding the tentacles.Jellyfish are composed of more than 90% water and most of their umbrella mass is made up of gelatinous material. •An umbrella-shaped reflector with a white or silvery inner surface, used to diffuse a nearby light.Using umbrellas for shooting a wedding party is ok, but not necessary. — 2014 •A strategy in which five players in the offensive zone form an umbrella-shaped formation around the opposition's goal net. formsumbrellers