There are 2 definitions of nth in English:

nth1

Syllabification: nth
Pronunciation: /enTH
 
/

adjective

Mathematics
1Denoting an unspecified member of a series of numbers or enumerated items: systematic sampling by taking every nth name from the list
More example sentences
  • In 1865 Fuchs studied nth order linear ordinary differential equations with complex functions as coefficients.
  • Euler starts with an nth degree polynomial p with the following properties.
  • Although not the first to do so, al-Kashi gave an algorithm for calculating nth roots which is a special case of the methods given many centuries later by Ruffini and Horner.
1.1(In general use) denoting an unspecified item or instance in a series, typically the last or latest in a long series: for the nth time that day they were forced to relate the whole story
More example sentences
  • Now, Irishness seems to include fifth, sixth, seventh, eighth, ninth, nth generations of so-called ‘Irish people’ - and it is these ‘lost Irish’ who are being targeted to tick the box in the census.
  • But we are once again dealing with nth generation reproduction, without any remastering or reconfiguration.
  • While I'm not keen on the notion that we're all dependent on something in these addiction-obsessed times, I know that my fondness for adrenaline-surfing exceeds healthy limits and that (for the nth time) I need to Do Something About It.

Phrases

to the nth degree

To the utmost: the gullibility of the electorate was tested to the nth degree by such promises
More example sentences
  • I mean the man loved himself and appreciated his own talents to the nth degree.
  • The multi-million pound consumer research industry is used by manufacturers to design and market products to the nth degree, down to colour, shape, timing and deciding on prices that will not break the consumer.
  • He said: ‘With the Data Protection Act you have to push it to the nth degree.’

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Word of the day internecine
Pronunciation: ˌɪntəˈniːsʌɪn
adjective
destructive to both sides in a conflict