The Collaborative International Dictionary of English v.0.48:

Franciscan \Fran*cis"can\, n. (R.C.Ch.)
   A monk or friar of the Order of St. Francis, a large and
   zealous order of mendicant monks founded in 1209 by St.
   Francis of Assisi. They are called also Friars Minor; and
   in England, Gray Friars, because they wear a gray habit.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Franciscan \Fran*cis"can\, a. [LL. Franciscus Francis: cf. F.
   franciscain.] (R. C. Ch.)
   Belonging to the Order of St. Francis of the Franciscans.
   [1913 Webster]

   Franciscan Brothers, pious laymen who devote themselves to
      useful works, such as manual labor schools, and other
      educational institutions; -- called also Brothers of the
      Third Order of St. Francis.

   Franciscan Nuns, nuns who follow the rule of St. Francis,
      esp. those of the Second Order of St. Francis, -- called
      also Poor Clares or Minoresses.

   Franciscan Tertiaries, the Third Order of St. Francis.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Franciscan
    adj 1: of or relating to Saint Francis of Assisi or to the order
           founded by him; "Franciscan monks"
    n 1: a Roman Catholic friar wearing the grey habit of the
         Franciscan order [syn: Franciscan, Grey Friar]