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longtime

[lawng-tahym, long-]
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adjective
  1. existing, occurring, or continuing for a long period of time; longstanding: longtime friends celebrating 50 years of association.
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Origin of longtime

First recorded in 1575–85; long1 + time
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for longtime

longtime

adjective
  1. of long standing
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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 longtime

adj.

also long-time, 1580s, from long (adj.) + time (n.).

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Online Etymology Dictionary, © 2010 Douglas Harper