Thirteen - definition of thirteen by The Free Dictionary
https://www.thefreedictionary.com/thirteen
thirteen ( ˈθɜːˈtiːn) n 1. (Mathematics) the cardinal number that is the sum of ten and three and is a prime number. See also number 1 2. (Mathematics) a numeral, 13, XIII, etc, representing this number 3. (Mathematics) the amount or quantity that is three more than ten; baker's dozen
DA: 98 PA: 85 MOZ Rank: 75