From WordNet (r) 2.0 (August 2003) [wn]:
animal
adj 1: of the appetites and passions of the body; "animal
instincts"; "carnal knowledge"; "fleshly desire"; "a
sensual delight in eating"; "music is the only sensual
pleasure without vice" [syn: {animal(a)}, carnal,
fleshly, sensual]
2: of the nature of or characteristic of or derived from an
animal or animals; "the animal kingdom"; "animal
instincts"; "animal fats" [ant: vegetable, mineral]
n : a living organism characterized by voluntary movement [syn:
animate being, beast, brute, creature, fauna]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Animal \An"i*mal\, n. [L., fr. anima breath, soul: cf. F.
animal. See Animate.]
1. An organized living being endowed with sensation and the
power of voluntary motion, and also characterized by
taking its food into an internal cavity or stomach for
digestion; by giving carbonic acid to the air and taking
oxygen in the process of respiration; and by increasing in
motive power or active aggressive force with progress to
maturity.
[1913 Webster]
2. One of the lower animals; a brute or beast, as
distinguished from man; as, men and animals.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Animal \An"i*mal\, a. [Cf. F. animal.]
1. Of or relating to animals; as, animal functions.
[1913 Webster]
2. Pertaining to the merely sentient part of a creature, as
distinguished from the intellectual, rational, or
spiritual part; as, the animal passions or appetites.
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3. Consisting of the flesh of animals; as, animal food.
[1913 Webster]
Animal magnetism. See Magnetism and Mesmerism.
Animal electricity, the electricity developed in some
animals, as the electric eel, torpedo, etc.
Animal flower (Zool.), a name given to certain marine
animals resembling a flower, as any species of actinia or
sea anemone, and other Anthozoa, hydroids, starfishes,
etc.
Animal heat (Physiol.), the heat generated in the body of a
living animal, by means of which the animal is kept at
nearly a uniform temperature.
Animal spirits. See under Spirit.
Animal kingdom, the whole class of beings endowed with
animal life. It embraces several subkingdoms, and under
these there are Classes, Orders, Families, Genera,
Species, and sometimes intermediate groupings, all in
regular subordination, but variously arranged by different
writers.
Note: The following are the grand divisions, or subkingdoms,
and the principal classes under them, generally
recognized at the present time:
Vertebrata, including Mammalia or Mammals, Aves or
Birds, Reptilia, Amphibia, Pisces or Fishes,
Marsipobranchiata (Craniota); and Leptocardia
(Acrania). Tunicata, including the Thaliacea, and
Ascidioidea or Ascidians. Articulata or Annulosa,
including Insecta, Myriapoda, Malacapoda, Arachnida,
Pycnogonida, Merostomata, Crustacea (Arthropoda); and
Annelida, Gehyrea (Anarthropoda).
Helminthes or Vermes, including Rotifera,
Ch[ae]tognatha, Nematoidea, Acanthocephala, Nemertina,
Turbellaria, Trematoda, Cestoidea, Mesozea.