Source : Webster's Revised Unabridged Dictionary (1913)

Ferial \Fe"ri*al\, n.
   Same as {Feria}.

Ferial \Fe"ri*al\, a. [LL. ferialis, fr. L. ferie holidays: cf.
   F. f['e]rial. See 5th {Fair}.]
   1. Of or pertaining to holidays. [Obs.] --J. Gregory.

   2. Belonging to any week day, esp. to a day that is neither a
      festival nor a fast.

Source : WordNet®

ferial
     adj : of or relating to or being a feria