Source : Webster's Revised Unabridged Dictionary (1913)

Koran \Ko"ran\ (?; 277), n. [Ar. gor[=a]n. See {Alcoran}.]
   The Scriptures of the Mohammedans, containing the professed
   revelations to Mohammed; -- called also {Alcoran}. [Written
   also {Kuran} or {Quran}.]

Alcoran \Al"co*ran\ (?; 277), n. [alcoran, fr. Ar. al-qor[=a]n,
   orig. the reading, the book, fr. qaraa to read. Cf. {Koran}.]
   The Mohammedan Scriptures; the Koran (now the usual form).
   [Spelt also {Alkoran}.]