Meaning of RETENTION in English

RETENTION

/ rɪˈtenʃn; NAmE / noun [ U ] ( formal )

1.

the action of keeping sth rather than losing it or stopping it :

The company needs to improve its training and retention of staff.

2.

the action of keeping liquid, heat, etc. inside sth rather than letting it escape :

Eating too much salt can cause fluid retention.

3.

the ability to remember things :

Visual material aids the retention of information.

—see also retain

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WORD ORIGIN

late Middle English (denoting the power to retain something): from Old French , from Latin retentio(n-) , from retinere hold back, from re- back + tenere hold.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.