soon (so?on)adv. soon·er, soon·est 1. a. In the near future; shortly: The bus should be here soon.b. Just prior to something; shortly: The news broke soon before he resigned.2. Without hesitation; promptly or speedily: I came as soon as possible.3. With willingness; readily: I’d as soon leave right now.4. Archaic Before the usual or appointed time; early.5. Obsolete Immediately.Idioms: no sooner … than As soon as: No sooner was the frost off the ground than the work began. sooner or later At some time; eventually: Sooner or later you will have to face the facts.[Middle English sone, from Old English s?na, immediately, soon.]Usage Note: In the phrase no sooner, the word sooner is a comparative adverb, just as the word better is in the phrase no better. As such, the expression should be followed by than, not when: No sooner had she opened her book than the doorbell rang. I had no sooner left than she called.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.soon (su?n) adv1. in or after a short time; in a little while; before long: the doctor will soon be here. 2. as soon as at the very moment that: she burst into tears as soon as she saw him. 3. as soon?as used to indicate that the second alternative mentioned is not preferable to the first: I’d just as soon go by train as drive. [Old English s?na; related to Old High German s?no, Gothic suns]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014soon (sun) adv. -er, -est. 1. within a short period; before long: soon after dark. 2. promptly; quickly: Finish as soon as you can. 3. readily or willingly: I would as soon walk as ride. 4. Obs. immediately; at once; forthwith. Idioms: 1. sooner or later, sometime; eventually. 2. would or had sooner, to prefer to: I would sooner not go. Compare rather (def. 7). [before 900; Old English s?na, c. Old High German s?n(o)] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.soon1. talking about the futureYou use soon to say that something will happen in a short time from now.You use soon to say that something happened a short time after something else in the past.If the verb is be, you put soon after it.You use how soon when you are asking how long it will be before something happens.You use as soon as to say that one event happens immediately after another.