1. [n]  the cardinal number that is the sum of thirteen and one
2. [adj]  being one more than thirteen

FOURTEEN is a 8 letter word that starts with F.

1. \Four"teen`\, a. [OE. fourtene, feowertene, AS.
   fe['o]wert[=y]ne, fe['o]wert[=e]ne. See {Four}, and {Ten},
   and cf. {Forty}.]
   Four and ten more; twice seven.
   
   

2. \Four"teen`\, n.
   1. The sum of ten and four; forteen units or objects.
   
   2. A symbol representing fourteen, as 14 or xiv.