adjective
fantastic
Strange or imaginative in a way that resembles fantasy.
The fantastic sculpture shows a whale carrying a castle above clouds.

Etymology
The Greek ancestor relates to imagination and mental appearance. Fantastic in this sense describes something that seems formed by fantasy rather than ordinary reality.
In context
Okay. Fantastic. And it was a steal. We got this as as a crazy good price.
More examples
- The story contains fantastic creatures with glass wings.
- She imagined a fantastic city beneath the sea.
- His paintings blend ordinary streets with fantastic inventions.
Forms
fantastic
Similar words
- fantastical
- More specifically imaginary or extravagantly unreal.
- fanciful
- Imaginative and often whimsical rather than plausible.