01 a. Next in order after the eighty-ninth.
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1.
Next in order after the eighty-ninth.
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2.
Constituting or being one of ninety equal parts.
Entry
4 senses · 2 variants
Webster, 1913
Ninetieth
02 n. The quotient of a unit divided by ninety; one of ninety equal parts of anything.
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1.
The quotient of a unit divided by ninety; one of ninety equal parts of anything.
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2.
The next in order after the eighty-ninth.