- 1 (of color or sound) soft, rich, and pleasant mellow autumn colors Mellow music and lighting helped to create the right atmosphere. The leaves looked golden in the mellow afternoon light.
- 2(of a taste or flavor) smooth and pleasant a mellow, fruity wine coffee with a full mellow flavor
- 3(of people) calm, gentle, and reasonable because of age or experience Dad's certainly grown mellower with age.
- 4(informal) (of people) relaxed, calm, and happy, especially after drinking alcohol After two glasses of wine, I was feeling mellow.