The Collaborative International Dictionary of English v.0.48:

October \Oc*to"ber\, n. [L., the eighth month of the primitive
   Roman year, which began in March, fr. octo eight: cf. F.
   Octobre. See Octave.]
   1. The tenth month of the year, containing thirty-one days.
      [1913 Webster]

   2. Ale or cider made in that month.
      [1913 Webster]

            The country gentlemen had a posset or drink they
            called October.                       --Emerson.
      [1913 Webster]

WordNet (r) 3.0 (2006):

October
    n 1: the month following September and preceding November [syn:
         October, Oct]