1. extremely good; wonderful
2. causing wonder or astonishment; extraordinary

Examples

• The concert was absolutely marvelous.
• She has a marvelous singing voice.
• The view from the mountaintop was marvelous.
• It's marvelous how quickly children learn languages.
• The magician performed marvelous tricks.
• We had a marvelous time at the party.
• The ancient ruins were a marvelous sight to behold.