1. sixty-third - Noun
2. sixty-third - Adjective
sixty-third
The ordinal form of the number sixty-three, describing a person or thing in position number 63 of a sequence.
The answer appears on the sixty-third page of the book.
She finished sixty-third in the race.
sixty-third (plural sixty-thirds)
One of sixty-three equal parts of a whole.
A sixty-third of 1260 is 20.