The meaning of fantastic is based on fantasy : How to use fantastic in a sentence. See examples of fantastic used in a sentence.
Definition of fantastic adjective in oxford advanced learner's dictionary. Fantastic describes what seems to have slight relation to the real world because of its strangeness or extravagance: Fantastic imaginary beasts such as the unicorn.
Feb 3, 2026adjective fantastic (comparative more fantastic, superlative most fantastic) wonderful; Extraordinarily good or great (used especially as an intensifier). Fantastic suggests a wild lack of restraint, a fancifulness so extreme as to lose touch with reality:
A fantastic scheme for a series of space cities. In informal use, fantastic often means simply. If you say that something is fantastic, you are emphasizing that you think it is very good or that you like it a lot.