The Collaborative International Dictionary of English v.0.48:

Individual \In`di*vid"u*al\ (?; 135), a. [L. individuus
   indivisible; pref. in- not + dividuus divisible, fr. dividere
   to divide: cf. F. individuel. See Divide.]
   [1913 Webster]
   1. Not divided, or not to be divided; existing as one entity,
      or distinct being or object; single; one; as, an
      individual man, animal, or city.
      [1913 Webster]

            Mind has a being of its own, distinct from that of
            all other things, and is pure, unmingled, individual
            substance.                            --A. Tucker.
      [1913 Webster]

            United as one individual soul.        --Milton.
      [1913 Webster]

   2. Of or pertaining to one only; peculiar to, or
      characteristic of, a single person or thing; distinctive;
      as, individual traits of character; individual exertions;
      individual peculiarities.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Individual \In`di*vid"u*al\, n.
   1. A single person, animal, or thing of any kind; a thing or
      being incapable of separation or division, without losing
      its identity; especially, a human being; a person.
      --Cowper.
      [1913 Webster]

            An object which is in the strict and primary sense
            one, and can not be logically divided, is called an
            individual.                           --Whately.
      [1913 Webster]

            That individuals die, his will ordains. --Dryden.
      [1913 Webster]

   2. (Zool.)
      (a) An independent, or partially independent, zooid of a
          compound animal.
      (b) The product of a single egg, whether it remains a
          single animal or becomes compound by budding or
          fission.
          [1913 Webster]

WordNet (r) 3.0 (2006):

individual
    adj 1: being or characteristic of a single thing or person;
           "individual drops of rain"; "please mark the individual
           pages"; "they went their individual ways" [syn:
           individual, single] [ant: common]
    2: separate and distinct from others of the same kind; "mark the
       individual pages"; "on a case-by-case basis" [syn:
       individual, case-by-case, item-by-item]
    3: characteristic of or meant for a single person or thing; "an
       individual serving"; "single occupancy"; "a single bed" [syn:
       individual, single(a)]
    4: concerning one person exclusively; "we all have individual
       cars"; "each room has a private bath" [syn: individual(a),
       private]
    n 1: a human being; "there was too much for one person to do"
         [syn: person, individual, someone, somebody,
         mortal, soul]
    2: a single organism

Moby Thesaurus II by Grady Ward, 1.0:

174 Moby Thesaurus words for "individual":
   Adamite, a certain, absolute, aerobic organism, an, an existence,
   anaerobic organism, any, any one, article, atomic,
   autotrophic organism, being, body, cat, certain, chap, character,
   characteristic, concrete, connotative, creature, critter, customer,
   defined, definite, demonstrative, denominative, denotative,
   designative, detailed, determinate, diagnostic, different,
   discrete, distinct, distinctive, distinguished, duck, earthling,
   either, emblematic, entelechy, entity, esoteric, especial,
   evidential, exceptional, exclusive, exhibitive, existence,
   existent, express, expressive, extraordinary, fellow, figural,
   figurative, fixed, genetic individual, groundling, guy, hand, head,
   heterotrophic organism, homo, human, human being, identifying,
   ideographic, idiosyncratic, implicative, indicating, indicative,
   indicatory, individualistic, indivisible, inner, integer, integral,
   intimate, irreducible, item, joker, life, living being,
   living soul, living thing, lone, man, material, matter, meaningful,
   metaphorical, microbe, microorganism, minute, module, monad,
   monadic, monistic, morphological individual, mortal, naming, nose,
   noteworthy, object, one, ont, organic being, organism,
   organization, own, particular, party, pathognomonic, peculiar,
   person, persona, personage, personal, personality,
   physiological individual, point, precise, private, proper,
   representative, respective, semantic, semiotic, separate, several,
   signalizing, significant, significative, signifying, simple,
   single, singleton, singular, sole, solid, solipsistic, solitary,
   somebody, someone, something, soul, special, specific, stuff,
   substance, suggestive, symbolic, symbolistic, symbological,
   symptomatic, symptomatologic, tellurian, terran, thing, typical,
   unanalyzable, undivided, uniform, unique, unit, unitary, virus,
   whole, worldling, zooid, zoon