measure word, punctuation, pronoun, numeral · classifier used for expressing years of age

我今年二十岁。

measure word, numeral, punctuation · years of age; classifier for how old a person or animal is

我的小侄女今年刚满三岁，长得非常可爱。

measure word, noun · a year; period of time

弟弟今年才五岁，就开始学习写汉字了。

noun, punctuation · a year with reference to agricultural crop production

岁稔年丰。

noun, time word, measure word · a year, especially referring to a calendar year or the passage of time

辞旧岁，迎新春。