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See you later; goodbye. So long, have a good weekend. I think we're ready to go. So long!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
Good-bye. So long, see ya later. It's been good talking to you. So long.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
Good-bye, as in So long, we'll see you next week. The allusion here is puzzling; long presumably means "a long time" and perhaps the sense is "until we meet again after a long time," but the usage has no such implication. [Colloquial; first half of 1800s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
so ˈlong (for now)(informal) goodbye until we next meet: So long for now. I’ll see you soon.
Farlex Partner Idioms Dictionary © Farlex 2017
interj. Good-bye. It’s been good talking to you. So long.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
Good-bye. This colloquial usage has been around since the first half of the 1800s and its origin is puzzling. “Long” may be short for “a long time,” but there is no such implication in the phrase. The American radio newscaster Lowell Thomas, active from 1930 to the mid-1970s, had a standard sign-off, “So long . . . until tomorrow.” Today the phrase is heard less often than a newer form of good-bye with an equally puzzling allusion, take care.
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer