成年 chéngnián HSK7 adult Definitions Defs Origin Strokes Stroke Words Sentences Sents chéngnián adult 成 chéng nounadjective mature (bound form) fully developed; grown; mature年 nián noun age a person's age or a specific stage in a person's lifechéngnián to come of age 成 chéng verbparticle to become to become; to turn into; to change into年 nián noun age a person's age or a specific stage in a person's lifechéngnián all year round 成 chéng whole (bound form) whole; entire; all (of a period of time)年 nián noun year a year or the duration of a year; also used to describe annual or yearly occurrences