Wiktionary
n. (context fractional English) One of seventy-three equal parts of a whole. num. (context ordinal English) The ordinal form of the number seventy-three, describing a person or thing in position number 73 of a sequence.
Usage examples of "seventy-third".
The day they arrived in New York, they had aimed the Airstream directly for Seventy-third and Broadway, where a one-bedroom apartment awaited them in the orchidaceous Ansonia Hotel.
To-day, in the seventy-third year of my life, my only desire is to live in peace and to be far from any person who might imagine that he has rights over my moral liberty, for it is impossible that any kind of tyranny should not coincide with this imagination.
Suppose, though, that one moonless night you were to dress in black pajamas (the ninja kind, the cat burglar kind), and, employing spider lines and tree frog cups, you scaled the wedding-cake facade of the Ansonia Hotel at Seventy-third and Broadway, climbing (pity your poor butt if you're afraid of heights) to floor eleven, where you use a short lightweight wrecking bar to pry loose a window frame.