Merriam-Webster Collegiate Dictionary - particular

 I. adjective  Etymology: Middle English particuler, from Anglo-French, from Late Latin ~is, from Latin particula small part  Date: 14th century  1. of, relating to, or being a single person or thing the ~ person I had in mind  2. obsolete partial  3. of, relating to, or concerned with details gave us a very ~ account of the trip  4.  a. distinctive among other examples or cases of the same general category ; notably unusual suffered from measles of ~ severity  b. being one unit or element among others ~ incidents in a story  5.  a. denoting an individual member or subclass in logic  b. affirming or denying a predicate to a part of the subject — used of a proposition in logic “some men are wise” is a ~ affirmative  6.  a. concerned over or attentive to details ; meticulous a very ~ gardener  b. nice in taste ; fastidious  c. hard to please ; exacting  Synonyms: see circumstantial, special  II. noun  Date: 15th century  1. archaic a separate part of a whole  2.  a. an individual fact, point, circumstance, or detail a hero in every ~ — Ron Fimrite  b. a specific item or detail of information — usually used in plural wanted to know all the ~s of the incident bill of ~s  3.  a. an individual or a specific subclass (as in logic) falling under some general concept or term  b. a ~ proposition in logic  Synonyms: see item