Definitions
Century Dictionary and Cyclopedia
- In an incredible manner; in a manner to preclude belief.
- Beyond prior belief or conception; unimaginably; inconceivably.
Wiktionary
- adv. manner In an incredible manner; not to be believed.
- adv. degree To a great extent; extremely.
- adv. speech act Used to note the surprising or hard-to-believe nature of what is being said and suggest that it is nevertheless true.
GNU Webster's 1913
- adv. In an incredible manner.
WordNet 3.0
- adv. exceedingly; extremely.
- adv. not easy to believe
Etymologies
- incredible + -ly (Wiktionary)
Examples
“In summation, disability is an incredibly complex subject and I'm sure everyone has a different opinion on the language that should be used to describe it, but it's * incredibly* refreshing to read posts that take this issue so seriously.”
“On Witte's tongue the phrase "incredibly well-bred man," which he used to describe the youthful Nicholas, became cutting invective.”
“Even as sales and profits may be declining, the company's share count is falling even faster," note the folks at Bespoke Investment Group from whom I stole the phrase "incredibly shrinking share count".”
“Rinella on buffalos, which he described as incredibly strong yet equally vulnerable.”
“Google in particularly seems to value the words in your title incredibly highly.”
“How do you ever stop what you call incredibly destructive, those suicide attacks?”
“In most instances, Bennett declined to grant the motions, one of which he characterized as "incredibly unfair.”
The Washington Post: National, World & D.C. Area News and Headlines - The Washington Post
“Robert Willard, head of the U.S. Pacific command, said it was currently necessary to deploy forces across great distances to reach the shipping lane, which he described as "incredibly vital to the region, to our partners and allies, and certainly to the United States.”
“Kids can respond in incredibly dramatic ways when their social netork is essentially removed from them in an instant.”
World of Warcraft punishment causes kid to lose his shit, abuse remote control
“… Talking to my son today he confirmed that the general population of Indonesians have not changed, they remain incredibly friendly welcoming and hospitable.”
Global Voices in English » Australia: Jakarta bombings bring personal reactions
Lists
These user-created lists contain the word ‘incredibly’.
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The Over-Worked "Very"
Synonyms for the word "very"
absolutely, actually, acutely, amazingly, assuredly, astonishingly, certainly, decidedly, desperately, downright, emphatically, exceedingly and 43 more...
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EN - intensifiers
vastly, deeply, dearly, awfully, truly, amply, acutely, absolutely, astonishingly, certainly, considerably, decidedly and 32 more...
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Basic English Vocabulary
Very basic words for ESL students.
contemplate, container, consumer, consultant, consensus, conscious, conscience, connection, confusion, confront, conflict, confident and 4334 more...
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Overused
Some words I hear too often.
amazing, incredibly, granular, awesome, at the end of the..., vast majority, make no mistake
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Adverbia
A long list of adverbs, beginning with full-drive. Someone had to list them. This list in continued in the list More Adverbia.
Read some sniping and some informative commentary about a...full-drive, portentously, unlawfully, legally, heterogeneously, consumingly, clancularly, inconsolably, prepositionally, retrogressively, symptomatically, decrepitly and 2460 more...
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my dictionary
able, abnormally, abroad, absent, abstract, acceptable, acceptance, access, accessible, accession, according to, account and 4551 more...
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Words I suspect myself of overusing
amazing, intrinsic, incredibly, fascinating, totally, completely, definitely, fantastic, absolutely, remotely, really, hitherto and 16 more...
Tweets
Looking for tweets for incredibly.

pterodactyl So, by analogy, could you use "credible" as a synonym for "not very"? As in "this is a credibly good idea", or "this will be credibly good for the language"? Jun 25, 2008
reesetee Wow. Incredible. Jun 25, 2008
Prolagus It's incredibly true. Bravo, efg. Jun 25, 2008
bilby It's incredibly popular, and incredibly annoying. Jun 25, 2008
efg This seems to be a recently popular substitute for "very." Jun 24, 2008