Meaning of VARIATION in English

VARIATION

[noun] [U]Variation is change in amount or level.Unemployment rates among white-collar workers show much less regional variation than corresponding rates among blue-collar workers.The medical tests showed some variation in the baby's heart rate.A variation is a difference.There are wide variations in the way pensioners have benefited from the system.The research team has a very good record of day-to-day variation in pollution in the atmosphere.A group of scientists studied global temperature variations over the last 140 years.The films she makes are all variations on the same theme.In music, a variation is one of the several short tunes which are based on the same simple tune, but are different from it and from the others.Symphonic variationsHe composed his first piece for the band, Variations on Annie Laurie, at the age of 12.

Cambridge English vocab.      Кембриджский английский словарь.