sixty-third

adjective

Definition of sixty-third

 (Entry 1 of 2)

1 : being number 63 in a countable series the sixty-third day — see Table of Numbers
2 : being one of 63 equal parts into which something is divisible a sixty-third share of the money

sixty-third

noun
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Definition of sixty-third (Entry 2 of 2)

1 : number 63 in a countable series
2 : the quotient of a unit divided by 63 : one of 63 equal parts of something one sixty-third of the total