Lifetijd

Lifetijd is a Dutch loanword from English lifetime, used to denote the duration of existence or usefulness of an entity. In standard Dutch, the preferred term is usually levensduur, but lifetijd is encountered in technical, marketing, and colloquial contexts.

In biology and medicine, lifetijd expresses the time an organism or cell remains alive; in consumer electronics, it refers to the expected life of a device, battery, or component; in software and data management, lifetijd can denote the time an object remains valid or alive within a program or system.

Measurement and interpretation: lifetijd is not a fixed unit; it is a time interval and may be estimated by testing, historical data, or reliability analysis. Related concepts include mean lifetime and product lifetime. In Dutch texts, these often correspond to levensduur, depending on context.

In everyday use, lifetijd appears in product descriptions and IT configurations (for example, time-to-live concepts in data handling). The term is more common in semi-formal or domain-specific writing; general usage tends toward levensduur.

See also: levensduur, levensverwachting, time-to-live.