retencij

Retencij is a term appearing in several languages to denote the act or capacity of retaining or holding something. In many contexts, it refers to the duration or amount of something kept, stored, or preserved. The precise meaning depends on the field, ranging from physical storage to policy periods.

In hydrology and civil engineering, retention describes the capacity of a basin, pond, or soil to hold water temporarily, reducing peak flows and aiding flood control. In environmental engineering, retention may also refer to the retention of nutrients or contaminants.

In information management and law, retention relates to data retention—the policies determining how long data is kept and when it is deleted to comply with regulations and governance. In records management, a retention schedule outlines the legally admissible or operationally useful period for documents.

In business and marketing, retention denotes the ability to keep customers or users over time, with metrics such as retention rate and churn. In medicine and health care, retention may refer to the maintenance of treatment effects or the persistence of substances in the body.

The term is sometimes used as a transliteration of the English word retention, particularly in multilingual texts. Because it appears across fields, retencij is a cross-disciplinary concept with field-specific definitions.