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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 um·brel·la /ˌʌmˈbrɛlə, ||ˈʌmˌ/

From: Webster's Revised Unabridged Dictionary (1913)

 Um·brel·la n.
 1. A shade, screen, or guard, carried in the hand for sheltering the person from the rays of the sun, or from rain or snow.  It is formed of silk, cotton, or other fabric, extended on strips of whalebone, steel, or other elastic material, inserted in, or fastened to, a rod or stick by means of pivots or hinges, in such a way as to allow of being opened and closed with ease. See Parasol.
    Underneath the umbrella's oily shed.   --Gay.
 2. Zool. The umbrellalike disk, or swimming bell, of a jellyfish.
 3. Zool. Any marine tectibranchiate gastropod of the genus Umbrella, having an umbrella-shaped shell; -- called also umbrella shell.
 Umbrella ant Zool., the sauba ant; -- so called because it carries bits of leaves over its back when foraging. Called also parasol ant.
 Umbrella bird Zool., a South American bird (Cephalopterus ornatus) of the family Cotingidae. It is black, with a large and handsome crest consisting of a mass of soft, glossy blue feathers curved outward at the tips.  It also has a cervical plume consisting of a long, cylindrical dermal process covered with soft hairy feathers.  Called also dragoon bird.
 Umbrella leaf Bot., an American perennial herb (Dyphylleia cymosa), having very large peltate and lobed radical leaves.
 Umbrella shell. Zool. See Umbrella, 3.
 Umbrella tree Bot., a kind of magnolia (Magnolia Umbrella) with the large leaves arranged in umbrellalike clusters at the ends of the branches.  It is a native of Pennsylvania, Virginia, and Kentucky.  Other plants in various countries are called by this name, especially a kind of screw pine (Pandanus odoratissimus).

From: WordNet (r) 2.0

      adj : covering or applying simultaneously to a number of similar
            items or elements or groups; "an umbrella
            organization"; "umbrella insurance coverage"
      n 1: a lightweight handheld collapsible canopy
      2: a formation of military planes maintained over ground
         operations or targets; "an air umbrella over England"
      3: 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"