一年一度 yīniányīdù once a year Origin Definitions Defs Strokes Stroke Words Sentences Sents 一 yī numeral one one; the number 1; single; alone年 nián noun year a year or the duration of a year; also used to describe annual or yearly occurrences一度 yīdù adjective once one time; on one occasion; used for events that occur at regular intervals