The Collaborative International Dictionary of English v.0.48:

Ten \Ten\ (t[e^]n), a. [AS. t[=e]n, ti['e]n, t[=y]n, t[=e]ne;
   akin to OFries. tian, OS. tehan, D. tien, G. zehn, OHG.
   zehan, Icel. t[imac]u, Sw. tio, Dan. ti, Goth. ta['i]hun,
   Lith. deszimt, Russ. desiate, W. deg, Ir. & Gael. deich, L.
   decem, Gr. de`ka, Skr. da[,c]an. [root]308. Cf. Dean,
   Decade, Decimal, December, Eighteen, Eighty,
   Teens, Tithe.]
   One more than nine; twice five.
   [1913 Webster]

         With twice ten sail I crossed the Phrygian Sea.
                                                  --Dryden.
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   Note: Ten is often used, indefinitely, for several, many, and
         other like words.
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               There 's a proud modesty in merit,
               Averse from begging, and resolved to pay
               Ten times the gift it asks.        --Dryden.
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         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ten \Ten\ (t[e^]n), n.
   1. The number greater by one than nine; the sum of five and
      five; ten units of objects.
      [1913 Webster]

            I will not destroy it for ten's sake. --Gen. xviii.
                                                  32.
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   2. A symbol representing ten units, as 10, x, or X.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ten
    adj 1: being one more than nine [syn: ten, 10, x]
    n 1: the cardinal number that is the sum of nine and one; the
         base of the decimal system [syn: ten, 10, X,
         tenner, decade]
    2: one of four playing cards in a deck with ten pips on the face
       [syn: ten-spot, ten]