thirteenth means the ordinal form of the number thirteen. Lexicurio rates it Rare gem — a strength score of 72 out of 100.
thirteenth is pronounced /ˌθɜːˈtiːnθ/.
adj
- The ordinal form of the number thirteen.
noun
- The person or thing in the thirteenth position.
- One of thirteen equal parts of a whole.
- The interval comprising an octave and a sixth.
- The thirteenth day of a month.“January 13th”