Variation

The act of varying; a partial change in the form, position, state, or qualities of a thing; modification; alternation; mutation; diversity; deviation; as, a variation of color in different lights; a variation in size; variation of language.

Extent to which a thing varies; amount of departure from a position or state; amount or rate of change.

Change of termination of words, as in declension, conjugation, derivation, etc.

Repetition of a theme or melody with fanciful embellishments or modifications, in time, tune, or harmony, or sometimes change of key; the presentation of a musical thought in new and varied aspects, yet so that the essential features of the original shall still preserve their identity.

One of the different arrangements which can be made of any number of quantities taking a certain number of them together.

the act of changing or altering something slightly but noticeably from the norm or standard; "who is responsible for these variations in taxation?"

the angle (at a particular location) between magnetic north and true north

(astronomy) any perturbation of the mean motion or orbit of a planet or satellite (especially a perturbation of the earth's moon)

(biology) an organism that has characteristics resulting from chromosomal alteration

something a little different from others of the same type; "an experimental version of the night fighter"; "a variant of the same word"; "an emery wheel is the modern variation of a grindstone"; "the boy is a younger edition of his father"

a repetition of a musical theme in which it is modified or embellished