Merriam-Webster Collegiate Dictionary - individual

 I. adjective  Etymology: Medieval Latin ~is, from Latin individuus indivisible, from in- + dividuus divided, from dividere to divide  Date: 15th century  1. obsolete inseparable  2.  a. of, relating to, or distinctively associated with an ~ an ~ effort  b. being an ~ or existing as an indivisible whole  c. intended for one person an ~ serving  3. existing as a distinct entity ; separate  4. having marked ~ity an ~ style  Synonyms: see special, characteristic  • ~ly adverb  II. noun  Date: 1605  1.  a. a particular being or thing as distinguished from a class, species, or collection: as  (1) a single human being as contrasted with a social group or institution a teacher who works with ~s  (2) a single organism as distinguished from a group  b. a particular person are you the ~ I spoke with on the telephone?  2. an indivisible entity  3. the reference of a name or variable of the lowest logical type in a calculus