The Collaborative International Dictionary of English v.0.48:

Plural \Plu"ral\, a. [L. pluralis, from plus, pluris, more; cf.
   F. pluriel, OF. plurel. See Plus.]
   Relating to, or containing, more than one; designating two or
   more; as, a plural word.
   [1913 Webster]

         Plural faith, which is too much by one.  --Shak.
   [1913 Webster]

   Plural number (Gram.), the number which designates more
      than one. See Number, n., 8.
      [1913 Webster]