mean life

See synonyms for mean life on
  1. the average time that an unstable particle or nucleus survives before it decays.

Words Nearby mean life Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use mean life in a sentence

  • You are wasting precious moments that may mean life or death to the one we both love.

    Jolly Sally Pendleton | Laura Jean Libbey
  • It was hard to foresee the critical stress that should mean life or death to the ship and its people.

    The Cup of Fury | Rupert Hughes
  • The ingenious M. Muret, again, had found a Swiss parish in which the mean life was the highest and the fecundity smallest known.

  • I kind of feel the life the boys live around these forests is a pretty mean life.

    The Man in the Twilight | Ridgwell Cullum
  • It was one of those friendly things, between friends, which might easily mean life or death.

    The Man in the Twilight | Ridgwell Cullum

British Dictionary definitions for mean life

mean life

  1. physics the average time of existence of an unstable or reactive entity, such as a nucleus, elementary particle, charge carrier, etc; lifetime. It is equal to the half-life divided by 0.693 15: Symbol: τ

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012