nth /ɛnθ/adjective 2noun 2forms 1phrases 1 adjective2 •Occurring at position n in a sequence. •(informal) Occurring at a relatively large but unspecified position in a series. noun2 •The item at position n in a sequence. •(informal) The item in a relatively large but unspecified position in a series. formsnths Phrases with nth to the nth degreeAs much as possible, to the greatest extent.