The Collaborative International Dictionary of English v.0.48:

Facile \Fac"ile\a. [L. facilis, prop., capable of being done or
   made, hence, facile, easy, fr. facere to make, do: cf. F.
   facile. Srr Fact, and cf. Faculty.]
   1. Easy to be done or performed: not difficult; performable
      or attainable with little labor.
      [1913 Webster]

            Order . . . will render the work facile and
            delightful.                           --Evelyn.
      [1913 Webster]

   2. Easy to be surmounted or removed; easily conquerable;
      readily mastered.
      [1913 Webster]

            The facile gates of hell too slightly barred.
                                                  --Milton.
      [1913 Webster]

   3. Easy of access or converse; mild; courteous; not haughty,
      austere, or distant; affable; complaisant.
      [1913 Webster]

            I meant she should be courteous, facile, sweet. --B.
                                                  Jonson.
      [1913 Webster]

   4. Easily persuaded to good or bad; yielding; ductile to a
      fault; pliant; flexible.
      [1913 Webster]

            Since Adam, and his facile consort Eve,
            Lost Paradise, deceived by me.        --Milton.
      [1913 Webster]

            This is treating Burns like a child, a person of so
            facile a disposition as not to be trusted without a
            keeper on the king's highway.         --Prof.
                                                  Wilson.
      [1913 Webster]

   5. Ready; quick; expert; as, he is facile in expedients; he
      wields a facile pen. -- Fac"ile*ly, adv. --
      Fac"ile*ness, n.
      [1913 Webster]

WordNet (r) 3.0 (2006):

facile
    adj 1: arrived at without due care or effort; lacking depth;
           "too facile a solution for so complex a problem"
    2: performing adroitly and without effort; "a facile hand"
    3: expressing yourself readily, clearly, effectively; "able to
       dazzle with his facile tongue"; "silver speech" [syn:
       eloquent, facile, fluent, silver, silver-tongued,
       smooth-spoken]

Moby Thesaurus II by Grady Ward, 1.0:

95 Moby Thesaurus words for "facile":
   Mickey Mouse, adaptable, adroit, apt, bendable, bending, biddable,
   bright, casual, clear, clever, compliant, cursory, cushy, deft,
   dexterous, dib, docile, ductile, easy, easy as pie, educable,
   effortless, elastic, elegant, extensible, extensile, fabricable,
   fictile, flexible, flexile, flexuous, flowing, fluent, formable,
   formative, giving, glib, graceful, impressible, impressionable,
   instructable, intelligent, light, like putty, limber, lissome,
   lithe, lithesome, malleable, moldable, motivated, nothing to it,
   painless, plain, plastic, pleasing, pliable, pliant, quick, ready,
   receptive, responsive, ripe for instruction, royal, schoolable,
   sensitive, sequacious, shallow, shapable, simple, simple as ABC,
   smooth, soft, springy, straightforward, submissive, superficial,
   supple, susceptible, teachable, thirsty for knowledge, tractable,
   tractile, trainable, tripping, unburdensome, uncomplicated,
   uncritical, untroublesome, voluble, whippy, willing, willowy,
   yielding



The Free On-line Dictionary of Computing (30 December 2018):

Facile

    A concurrent extension of ML from ECRC.

   (http://ecrc.de/facile/facile_home.html).

   ["Facile: A Symmetric Integration of Concurrent and Functional
   Programming", A. Giacalone et al, Intl J Parallel Prog
   18(2):121-160, Apr 1989].

   (1994-12-01)