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so long
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interjection Informal.
goodbye: I said so long and left.
QUIZ
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Which of the following nouns has an irregular plural form?
Origin of so long
An Americanism dating back to 1840â50
Words nearby so long
Solomon's seal, solo mother, Solon, solonchak, solonetz, so long, so long as, solo parent, solo stop, Solothurn, solo whist
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
How to use so long in a sentence
British Dictionary definitions for so long
so long
sentence substitute
informal farewell; goodbye
adverb
Southern African slang for the time being; meanwhile
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
Other Idioms and Phrases with so long
so long
Good-bye, as in So long, we'll see you next week. The allusion here is puzzling; long presumably means âa long timeâ and perhaps the sense is âuntil we meet again after a long time,â but the usage has no such implication. [Colloquial; first half of 1800s]
The American HeritageÂź Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.