Definition of life test in US English:

life test

noun

  • A test made on a sample of manufactured products or components in specified operating conditions, either for a certain length of time or until failure occurs, in order to determine their reliability; (also, as a mass noun) testing of this kind.

Origin

Late 19th century. From life + test.

Pronunciation

life test

/ˈlʌɪf tɛst/