noun
definition
The person or thing in the ninetieth position.
definition
One of ninety equal parts of a whole.
adjective
definition
The ordinal form of the number ninety.
Examples of ninetieth in a Sentence
Busby died in 1695, in his ninetieth year, and was buried in Westminster Abbey, where his effigy is still to be seen.
The king took some part in the negotiations which preceded the war, but died soon after its commencement in the ninetieth year of his age and the sixtieth of his reign.
While Johnson was busied with his Idlers, his mother, who had accomplished her ninetieth year, died at Lichfield.
After a time Hobbes took heart again and began a third period of controversial activity, which did not end, on his side, till his ninetieth year.