Meaning of “variation” - Learner’s Dictionary

variation

noun uk us /ˌveəriˈeɪʃən/
DIFFERENCE [ C, U ]

B2 a difference in amount or quality:

variations in price
SOMETHING DIFFERENT [ C ]

something that is slightly different from the usual form:

It's a variation on the standard apple pie.

(Definition of “variation” from the Cambridge Learner’s Dictionary © Cambridge University Press)