adjective, informal - pleasantly mature or softened by age, typically referring to people who have become more relaxed and understanding over time
adjective - (of taste or flavour) pleasant and smooth
adjective, informal - relaxed, calm, and easy-going, often as a result of being in a peaceful environment or drinking some alcohol
adjective - (of colour or sound) soft, smooth, and pleasant to the senses
adjective, formal - happening, existing, or functioning at the same time or rate