Meaning of VARIATION in English

VARIATION

var ‧ i ‧ a ‧ tion W2 AC /ˌveəriˈeɪʃ ə n $ ˌver-/ BrE AmE noun

[ Word Family: noun : ↑ variable , ↑ variance , ↑ variant , ↑ variety , ↑ variability , ↑ variation ; adjective : ↑ variable ≠ ↑ invariable , ↑ varied , ↑ various ; adverb : ↑ variably ≠ ↑ invariably , ↑ variously ; verb : ↑ vary ]

1 . [uncountable and countable] a difference between similar things, or a change from the usual amount or form of something

variation of

White bread is really just a variation of French bread.

variation in

variations in the quality of the rugs

variation among

There is a great deal of variation among the responses.

variation between

The study concluded that the variation between the CD players was very small.

2 . [countable] something that is done in a way that is different from the way it is usually done:

Most of his poems are variations on the theme of love.

3 . [countable] one of a set of short pieces of music, each based on the same simple tune:

Bach’s Goldberg variations

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.