The Collaborative International Dictionary of English v.0.48:

Vulture \Vul"ture\ (?; 135), n. [OE. vultur, L. vultur: cf. OF.
   voltour, F. vautour.] (Zool.)
   Any one of numerous species of rapacious birds belonging to
   Vultur, Cathartes, Catharista, and various other genera
   of the family Vulturidae.
   [1913 Webster]

   Note: In most of the species the head and neck are naked or
         nearly so. They feed chiefly on carrion. The condor,
         king vulture, turkey buzzard, and black vulture
         (Catharista atrata) are well known American species.
         The griffin, lammergeir, and Pharaoh's chicken, or
         Egyptian vulture, are common Old World vultures.
         [1913 Webster]

WordNet (r) 3.0 (2006):

vulture
    n 1: any of various large diurnal birds of prey having naked
         heads and weak claws and feeding chiefly on carrion
    2: someone who attacks in search of booty [syn: marauder,
       predator, vulture, piranha]

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "vulture":
   blackmailer, bloodsucker, extortionist, filch, harpy, heist, hook,
   leech, lift, pinch, predator, profiteer, racketeer, raptor,
   shakedown artist, shark, snitch, swipe, vampire



Easton's 1897 Bible Dictionary:

Vulture
   (1.) Heb. da'ah (Lev. 11:14). In the parallel passage (Deut.
   14:13) the Hebrew word used is _ra'ah_, rendered "glede;" LXX.,
   "gups;" Vulg., "milvus." A species of ravenous bird,
   distinguished for its rapid flight. "When used without the
   epithet 'red,' the name is commonly confined to the black kite.
   The habits of the bird bear out the allusion in Isa. 34:15, for
   it is, excepting during the winter three months, so numerous
   everywhere in Palestine as to be almost gregarious." (See EAGLE.)

     (2.) In Job 28:7 the Heb. 'ayyah is thus rendered. The word
   denotes a clamorous and a keen-sighted bird of prey. In Lev.
   11:14 and Deut. 14:13 it is rendered "kite" (q.v.).