Source : Webster's Revised Unabridged Dictionary (1913)

Sixteen \Six"teen`\, a. [AS. sixt?ne, sixt?ne. See {Six}, and
   {Ten}, and cf. {Sixty}.]
   Six and ten; consisting of six and ten; fifteen and one more.

Sixteen \Six"teen`\, n.
   1. The number greater by a unit than fifteen; the sum of ten
      and six; sixteen units or objects.

   2. A symbol representing sixteen units, as 16, or xvi.

Source : WordNet®

sixteen
     adj : being one more than fifteen [syn: {16}, {xvi}]
     n : the cardinal number that is the sum of fifteen and one [syn:
          {16}, {XVI}]