From Longman Dictionary of Contemporary Englishfantasticfan‧tas‧tic /fænˈtæstɪk/ ●●●S3 adjective 🔊 🔊 1GOOD/EXCELLENTextremely good, attractive, enjoyable etc 🔊 You look fantastic! 🔊 It’s a fantastic place, really beautiful!► see thesaurus at good2spokenGOOD/EXCELLENT used when someone has just told you something good syn excellent, wonderful 🔊 ‘I’ve passed my driving test.’ ‘Fantastic!’ 🔊 That’s fantastic news!3LOT/LARGE NUMBER OR AMOUNTa fantastic amount is extremely large syn huge 🔊 Kids spend fantastic amounts of money on CDs.4IMPOSSIBLEa fantastic plan, suggestion etc is not likely to be possible 🔊 fantastic schemes for making money5[only before noun]STRANGE a fantastic story, creature, or place is imaginary and is very strange and magical syn fantastical, → fantasy (3) 🔊 fantastic tales of dragons and fairy queens —fantastically /-kli/ adverbTHESAURUSfantastic/terrific spoken extremely good, in a way that makes you feel excited and happy – used mainly in spoken EnglishThe view from the top was fantastic.He did a fantastic job.That’s a terrific idea!‘I passed!’ ‘That’s terrific!’great spoken extremely good – used mainly in spoken EnglishThanks for a great afternoon.‘Did you have a good holiday?' ’It was great!'excellent extremely good – used especially about the quality of something. Excellent is more formal than fantastic/terrific or great, and is used in both spoken and written EnglishOur local theatre has put on some excellent productions.It is an excellent film.wonderful extremely good in a way that impresses you or makes you very pleasedShe is really a wonderful person.That’s wonderful news!marvellous British English, marvelous American English extremely good in a way that impresses you or makes you very pleased. Marvellous sounds a little old-fashioned, but is still fairly commonWe had a marvellous dinner at a little restaurant near the hotel.Martino’s performance was marvelous. amazing extremely good in a surprising and exciting wayStanding there on top of Mount Fuji was an amazing experience.incredible extremely good in a surprising and exciting way. Incredible is often used when something is so good that it almost seems unlikelyWhat a goal! That was incredible!It was an incredible moment - one that I will never forget.brilliant British English informal extremely good‘How was your trip?’ ‘Absolutely brilliant!’What a brilliant idea!be out of this world used when saying that something is so good that you cannot imagine anything betterTheir desserts are out of this world.