Definitions

1. adjective

next after the (n-1)th, referring to a position in a sequence or series

“The 5th song was followed by the nth song in the playlist.”

2. noun

a mathematical expression or symbol representing the position of an element in a sequence or series, especially when the position is variable or unknown

“The nth term of the sequence can be calculated using the formula.”

3. adverb

used to indicate that something is in its nth position in a sequence or series

“The nth item on the list is the one we need to focus on.”