The Collaborative International Dictionary of English v.0.48:

Greek \Greek\, a. [AS. grec, L. Graecus, Gr. ?: cf. F. grec. Cf.
   Grecian.]
   Of or pertaining to Greece or the Greeks; Grecian.
   [1913 Webster]

   Greek calends. See under Greek calends in the vocabulary.


   Greek Church (Eccl. Hist.), the Eastern Church; that part
      of Christendom which separated from the Roman or Western
      Church in the ninth century. It comprises the great bulk
      of the Christian population of Russia (of which this is
      the established church), Greece, Moldavia, and Wallachia.
      The Greek Church is governed by patriarchs and is called
      also the Byzantine Church.

   Greek cross. See Illust. (10) Of Cross.

   Greek Empire. See Byzantine Empire.

   Greek fire, a combustible composition which burns under
      water, the constituents of which are supposed to be
      asphalt, with niter and sulphur. --Ure.

   Greek rose, the flower campion.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Greek \Greek\, n.
   1. A native, or one of the people, of Greece; a Grecian;
      also, the language of Greece.
      [1913 Webster]

   2. A swindler; a knave; a cheat. [Slang]
      [1913 Webster]

            Without a confederate the . . . game of baccarat
            does not . . . offer many chances for the Greek.
                                                  --Sat. Rev.
      [1913 Webster]

   3. Something unintelligible; as, it was all Greek to me.
      [Colloq.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

Greek
    adj 1: of or relating to or characteristic of Greece or the
           Greeks or the Greek language; "Greek mythology"; "a
           Grecian robe" [syn: Greek, Grecian, Hellenic]
    n 1: the Hellenic branch of the Indo-European family of
         languages [syn: Greek, Hellenic, Hellenic language]
    2: a native or inhabitant of Greece [syn: Greek, Hellene]

The Free On-line Dictionary of Computing (19 January 2023):

greek
greeking

   1.  To display text as abstract dots and lines
   in order to give a preview of layout without actually being
   legible.  This is faster than drawing the characters correctly
   which may require scaling or other transformations.  Greeking
   is particularly useful when displaying a reduced image of a
   document where the text would be too small to be legible on
   the display anyway.

   A related technique is lorem ipsum.

   (2006-09-18)