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lifelong

[lahyf-lawng, -long] /ˈlaɪfˌlɔŋ, -ˌlɒŋ/
adjective
1.
lasting or continuing through all or much of one's life:
lifelong regret.
Origin of lifelong
1750-1760
1750-60; life + long1 (adv.)
Can be confused
lifelong, livelong.
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for lifelong

lifelong

/ˈlaɪfˌlɒŋ/
adjective
1.
lasting for or as if for a lifetime
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
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Word Origin and History for lifelong
adj.

also life-long, "continuing a lifetime," 1855, from life (n.) + long (adj.).

Online Etymology Dictionary, © 2010 Douglas Harper
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