(Intransitive) To grow aged; to become old; to show marks of age.
To come to be by a gradual process or by degrees; become:
To cause to generate pus.
To cause to fester or rankle.
To become or make ripe; mature, age, cure, etc.
The definition of mellow is to calm down or to cause someone to calm down.
(Biology) To progress from earlier to later stages of a life cycle:
Find another word for maturating. In this page you can discover 8 synonyms, antonyms, idiomatic expressions, and related words for maturating, like: maturing, aging, growing, suppurating, festering, ripening, mellowing and developing.