- the longest period over which the life of any organism or species may extend, according to the available biological knowledge concerning it.
- the longevity of an individual.
Origin of life span
First recorded in 1915–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for lifespan
Mortality rates there were “at least 10.7 percent to 16.7 percent over its 35-year lifespan.”Ireland’s ‘Mother and Baby Home’ Horror Goes Beyond Tuam’s Dead Infants
June 6, 2014
Imagine downloading a new wetware patch to “fix” an illness, or programming your genes to radically extend your lifespan.On Transhumanism and Why Technology Is Our Silicon Nervous System
April 26, 2014
The Paleo diet is dangerous because it permits red meat, which clogs our arteries and shortens our lifespan.In Defense of the Paleo Diet
Chris Kresser, M.S., L.AC.
January 16, 2014
Parkhomenko estimates a lifespan of 14 to 16 months for R4H.Shots Fired Early in Hillary Clinton Super PAC War
August 2, 2013
If this telling is correct, whatever else Chavismo is, it's not sustainable beyond the lifespan of Chavez himself.David's Bookclub: Blogging the Revolution
March 17, 2013
And what the hell, the doctors are increasing our lifespan every day with new drugs and things, aren't they?The Slizzers
- the period of time during which a human being, animal, machine, etc, may be expected to live or function under normal conditions
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
Word Origin and History for lifespan
Online Etymology Dictionary, © 2010 Douglas Harper
- A lifetime.
- The average or maximum length of time an organism, a material, or an object can be expected to survive or last.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.