Relating to an unspecified ordinal number: ten to the nth power. (adjective)
Highest; utmost: delighted to the nth degree. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "nth" in a sentence
"You note that twoth is used in mathematics and computing, and you mention the terms nth and zeroth."
"It's just nice to see a a studio like Pixar taking real chances with the medium, risking failure to the "nth" degree to do so."
"Also, I'll spare you all the "nth" rendition of my "I Hate All Second Term Presidencies, And Their Corollaries, Without Exception" rant, except to say that my views therein are, regrettably and deplorably, once again being validated."