The Collaborative International Dictionary of English v.0.48:

Runic \Ru"nic\, a.
   Of or pertaining to a rune, to runes, or to the Norsemen; as,
   runic verses; runic letters; runic names; runic rhyme.
   [1913 Webster]

   Runic staff. See Clog almanac, under Clog.

   Runic wand, a willow wand bearing runes, formerly thought
      to have been used by the heathen tribes of Northern Europe
      in magical ceremonies.
      [1913 Webster]

WordNet (r) 3.0 (2006):

runic
    adj 1: relating to or consisting of runes; "runic inscription"

Moby Thesaurus II by Grady Ward, 1.0:

29 Moby Thesaurus words for "runic":
   Alcaic, Anacreontic, Castalian, Homeric, Hudibrastic, Pierian,
   Pindaric, Theocritean, bardic, bucolic, didactic, dithyrambic,
   dramatic, eclogic, elegiac, epic, heroic, idyllic, mock-heroic,
   narrative, pastoral, poetic, poetico-mystical,
   poetico-mythological, poetico-philosophic, poetlike, rhapsodic,
   sapphic, skaldic



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

runic
 adj.

    Syn. obscure. VMS fans sometimes refer to Unix as ?Runix?; Unix fans
    return the compliment by expanding VMS to ?Very Messy Syntax? or ?Vachement
    Mauvais Syst?me? (French idiom, ?Hugely Bad System?).


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

runic

    Obscure, consisting of runes.

   VMS fans sometimes refer to Unix as "RUnix".  Unix fans
   return the compliment by expanding VMS to "Very Messy Syntax"
   or "Vachement Mauvais Systeme" (French; literally "Cowlike Bad
   System", idiomatically "Bitchy Bad System").

   (1996-09-17)