Adjective fabulous has 3 senses
- fabulous, fab - extremely pleasing; "a fabulous vacation"
 Antonym:  displeasing (indirect, via pleasing)
 
- fabulous, mythic, mythical, mythologic, mythological - based on or told of in traditional stories; lacking factual basis or historical validity; "mythical centaurs"; "the fabulous unicorn"
 Antonyms:  real, existent (indirect, via unreal)
 
- fabulous - barely credible; "the fabulous endurance of a marathon runner"
 Antonyms:  credible, believable (indirect, via incredible)
 
,