Wordnet 3.0
NOUN (1)
1. 
 a stiff broad-brimmed hat with the brim turned up at the sides and projecting in front; 
 worn by some clergymen in Britain; 
The Collaborative International Dictionary of English v.0.48:
Shovel \Shov"el\, n. [OE. shovele, schovele, AS. scoft, sceoft;
   akin to D. schoffel, G. schaufel, OHG. sc?vala, Dan. skovl,
   Sw. skofvel, skyffel, and to E. shove. [root]160. See
   Shove, v. t.]
   An implement consisting of a broad scoop, or more or less
   hollow blade, with a handle, used for lifting and throwing
   earth, coal, grain, or other loose substances.
   [1913 Webster]
   Shovel hat, a broad-brimmed hat, turned up at the sides,
      and projecting in front like a shovel, -- worn by some
      clergy of the English Church. [Colloq.]
   Shovelspur (Zool.), a flat, horny process on the tarsus of
      some toads, -- used in burrowing.
   Steam shovel, a machine with a scoop or scoops, operated by
      a steam engine, for excavating earth, as in making railway
      cuttings.
      [1913 Webster]
WordNet (r) 3.0 (2006):
shovel hat
    n 1: a stiff broad-brimmed hat with the brim turned up at the
         sides and projecting in front; worn by some clergymen in
         Britain