thirteen

 
Pronunciation: /θəːˈtiːn, ˈθəːtiːn/

cardinal number

  • equivalent to the sum of six and seven; one more than twelve, or seven less than twenty; 13: thirteen miles away a rise of 13 per cent thirteen of the bishops voted against the motion (Roman numeral: xiii or XIII)
  • a size of garment or other merchandise denoted by thirteen.
  • thirteen years old: two boys aged eleven and thirteen

Derivatives

thirteenth

ordinal number

Origin:

Old English thrēotīene (see three, -teen). The spelling with initial thi- is recorded in late Middle English