Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. A taste persisting in the mouth after the substance that caused it is no longer present.
- n. A feeling that remains after an event or experience, especially one that was unpleasant.
Century Dictionary and Cyclopedia
- n. A gustatory sensation which persists after the stimulus that originally excited it has ceased to act.
Wiktionary
- n. A taste of something that persists when it is no longer present.
- n. The persistence of the taste of something no longer present.
- n. Of wine, finish.
GNU Webster's 1913
- n. A taste which remains in the mouth after eating or drinking.
WordNet 3.0
- n. an afterimage of a taste
Examples
“That metallic aftertaste is just not pleasant to eat.”
“I get an aftertaste from the sweeteners Bernstein does allow, so I greatly prefer Splenda as a substitute.”
“- Too much milk/too little milk (you want a nice balance between the milk and the tea) - Chemical aftertaste from the powdered flavoring they use … bleah”
“The nasty aftertaste is the feeling that an entire decade of my life was wasted.”
“I detected a small aftertaste from the pudding but that's just me being picky.”
“Alcohol bitterness greets you up front and a relatively thin aftertaste lingers on the palate, but the action in between is more than worth the trip.”
“The strawberry was warm and sweet and fragrant, with a slightly bitter aftertaste from the soil.”
“Angel food cakes will be more moist and natural tasting when made with real egg whites (even though they’re actually not made when made with meringue powder), and if you choose to use the meringue powder in a mousse, it may have a starchy aftertaste from the cornstarch in the meringue powder.”
“And Hazel, the lack of aftertaste is because it’s made of raw cane sugar rather than syrups, in case you’re interested!”
“It has a smoky aftertaste, that is curiously similar to that of a grilled piece of tuna.”
Lists
These user-created lists contain the word ‘aftertaste’.
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food collection
bread, peel, pot, chorizo, Filet, olive, fill, Phyllo, dough, bake, mat, pinot and 988 more...
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afters
aftermath, after-tax, aftertaste, afterworld, afterword, after hours, after glow, after-hours, after-shave, after the fact, after-wit, afternoon and 44 more...

Prolagus Is the chemical aftertaste the reason why people eat hot dogs, or is it some kind of bonus?
(Neil Gaiman) Mar 13, 2008