American English

Definition of fantastic adjective from the Oxford Advanced American Dictionary



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  1. 1(informal) extremely good; excellent synonym great a fantastic beach in California a fantastic achievement The weather was absolutely fantastic. You got the job? Fantastic! Thesaurusgreatcool fantastic fabulous terrific awesomeThese are all informal words that describe someone or something that is very good, pleasant, enjoyable, etc.great (informal) very good; giving a lot of pleasure:We had a great time in (informal) used to show that you admire or approve of something, often because it is fashionable, attractive, or different:I think their new song's really cool.fantastic (informal) extremely good; giving a lot of pleasure:I had a fantastic vacation in Mexico.fabulous (informal) extremely good:Jane's a fabulous cook.(Fabulous is slightly more old-fashioned than the other words in this set.)terrific (informal) extremely good; wonderful:She's doing a terrific job.awesome (informal) very good, impressive, or enjoyable:The show was just awesome.Patterns to have a(n) great/fantastic/fabulous/terrific/awesome time to look/sound great/cool/fantastic/fabulous/terrific/awesome really great/cool/fantastic/fabulous/terrific/awesome absolutely great/fantastic/fabulous/terrific/awesome
  2. 2(informal) very large; larger than you expected synonym amazing, enormous The response to our fundraiser was fantastic. The car costs a fantastic amount of money.
  3. 3(fantastical
    [usually before noun] strange and showing a lot of imagination synonym weird fantastic dreams of forests and jungles
  4. 4impossible to put into practice a fantastic idea/project
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adverb fantastically successful a fantastically shaped piece of stone
See the Oxford Advanced Learner's Dictionary entry: fantastic