ten-day period of a month
Used mainly in compounds and date expressions dividing a month into roughly three ten-day periods, especially 上旬, 中旬, and 下旬.
The meeting is scheduled to be held in early June.
Please send the documents by the middle third of the month.
decade of age; ten-year period in one's life
Rare, old-fashioned or literary use for a ten-year span of age, typically seen in compounds such as 六旬 or 七旬 rather than as a free everyday noun.
七旬 is an old-fashioned expression referring to one's seventies.
last third of a month; 21st to the last day
middle ten days of a month; 11th to 20th of a month
first third of a month; first ten days of a month
first ten days of a month; early part of a month
ten-day report; bulletin issued every ten days
Sino-Japanese reading じゅん of 旬. The kanji is conventionally associated here with a ten-day cycle or period; the detailed historical derivation is not asserted.