Meaning of COVARIANCE in English

[ kəʊ'vɛ:rɪəns ]

■ noun

1》 Mathematics the property of a function of retaining its form when the variables are linearly transformed.

2》 Statistics the mean value of the product of the deviations of two variates from their respective means.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.