the time that the life of someone or something continues; the term of a life: peace within our lifetime.
Physics. mean life.
for the duration of a person's life: He has a lifetime membership in the organization.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use lifetime in a sentence
This is the strongest storm to hit the region in any resident’s lifetime, and the area will be recovering from the storm for a long time.Hurricane Laura is the strongest storm to hit Louisiana in more than a century | Sara Chodosh | August 28, 2020 | Popular-Science
That being said, I don’t think you’re going to see a Republican or a Democrat president, at least in my lifetime, that is anything like this.Full Transcript: Sean Spicer on ‘The Carlos Watson Show’ | Daniel Malloy | August 26, 2020 | Ozy
Seeing an eclipse of the sun by Pluto is a once-in-a-lifetime event.These Images Expose the Dark Side of the Solar System - Issue 89: The Dark Side | Corey S. Powell | August 26, 2020 | Nautilus
For example, when a virtual gluon splits into two virtual quarks, the quarks’ possible lifetimes can vary.The Mathematical Structure of Particle Collisions Comes Into View | Charlie Wood | August 20, 2020 | Quanta Magazine
Peter Timmer has seen a lot of change in the farming business over his lifetime.How the Supermarket Helped America Win the Cold War (Ep. 386 Rebroadcast) | Stephen J. Dubner | August 6, 2020 | Freakonomics
The sad fact is that more than 41 percent of trans people admit making at least one suicide attempt in their lifetime.Dear Leelah, We Will Fight On For You: A Letter to a Dead Trans Teen | Parker Molloy | January 1, 2015 | THE DAILY BEAST
If you answered seven or more of these correctly, you are eligible for a lifetime supply of Metamucil.
Having graduated Juilliard last spring, Alex Sharp is too young to have given the performance of a lifetime.Hedwig, Hugh & Michael Cera: 12 Powerhouse Theater Performances of 2014 | Janice Kaplan | December 31, 2014 | THE DAILY BEAST
Det. Rafael Ramos spent a lifetime trying to become a police officer, entering the academy at age 38.
Each well requires 1,500—2,000 truck trips over the lifetime of the well.
This new nexus of print has grown up in the lifetime of four or five generations, and it is undergoing constant changes.The Salvaging Of Civilisation | H. G. (Herbert George) Wells
I didnt think much of that, but he said afterward, A man may do in an hour what he cant undo in a lifetime.Tessa Wadsworth's Discipline | Jennie M. Drinkwater
She meets a sympathetic soul, and you come across her pouring into his ear the love and despair of a lifetime.The Joyous Adventures of Aristide Pujol | William J. Locke
I wonder if I am letting slip through my fingers one of the opportunities that come to a man but once in a lifetime!Tessa Wadsworth's Discipline | Jennie M. Drinkwater
In contrast to this we have the story of the ghost of a lady of title, who had been in her lifetime Princess Anna of Saxony.Second Edition of A Discovery Concerning Ghosts | George Cruikshank
British Dictionary definitions for lifetime
the length of time a person or animal is alive
(as modifier): a lifetime supply
the length of time that something functions, is useful, etc
physics the average time of existence of an unstable or reactive entity, such as a nucleus, excited state, elementary particle, etc; mean life
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