Common Meanings
1
rùn闰
Refers to the addition of an extra day in a leap year (Gregorian calendar, called '闰日' and '闰年') or an extra month in a leap lunar year (Chinese lunar calendar, called '闰月') to keep the calendar synchronized with astronomical events.
今年是闰年，二月有二十九天。
This year is a leap year, and February has twenty-nine days.
Refers to something that is supplementary, irregular, or secondary, existing alongside or in contrast to a standard or primary item.
农历中每隔几年就会有一个闰月。
Every few years, there is an intercalary month in the lunar calendar.