Fantastic/fænˈtæstɪk/ Definition 1 of 3Pro Tip 1/3Positive Emphasis Used to express strong approval or admiration, often with excitement. Your performance was fantastic; it exceeded all expectations! Pro Tip 2/3Enhances Compliments Makes compliments stronger and more enthusiastic, ideal for praise. You did a fantastic job organizing the event! Pro Tip 3/3Informal Tone Often used in casual conversation rather than formal writing or speeches. We had a fantastic time at the beach yesterday.