The Collaborative International Dictionary of English v.0.48:

Incantation \In`can*ta"tion\, n. [L. incantatio, fr. incantare
   to chant a magic formula over one: cf. F. incantation. See
   Enchant.]
   [1913 Webster]
   1. The act or process of using formulas sung or spoken, with
      occult ceremonies, for the purpose of raising spirits,
      producing enchantment, or affecting other magical results;
      enchantment. "Mysterious ceremony and incantation."
      --Burke.
      [1913 Webster]

   2. A formula of words used as above.
      [1913 Webster]

   3. The repetitive invoking of old sayings, or emitting a
      wordy discourse with little or no meaning, to avoid
      serious discussion; obfuscation; as, to defend one's views
      with empty incantations.
      [PJC]

WordNet (r) 3.0 (2006):

incantation
    n 1: a ritual recitation of words or sounds believed to have a
         magical effect [syn: incantation, conjuration]

Moby Thesaurus II by Grady Ward, 1.0:

22 Moby Thesaurus words for "incantation":
   abracadabra, bewitchment, conjuration, conjurement, devil,
   enchantment, evocation, exorcisation, exorcism, exsufflation,
   hocus-pocus, invocation, magic formula, magic words, mumbo jumbo,
   necromancy, open sesame, rune, sorcery, witchcraft, witchery,
   wizardry



The Jargon File (version 4.4.7, 29 Dec 2003):

incantation
 n.

    Any particularly arbitrary or obscure command that one must mutter at a
    system to attain a desired result. Not used of passwords or other explicit
    security features. Especially used of tricks that are so poorly documented
    that they must be learned from a wizard. ?This compiler normally locates
    initialized data in the data segment, but if you mutter the right
    incantation they will be forced into text space.?


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

incantation
spell

   Any particularly arbitrary or obscure command that one must
   mutter at a system to attain a desired result.  Not used of
   passwords or other explicit security features.  Especially
   used of tricks that are so poorly documented that they must be
   learned from a wizard.  "This compiler normally locates
   initialised data in the data segment, but if you mutter the
   right incantation they will be forced into text space."