Twelvemonth

n.

1.

A year which consists of twelve calendar months. I shall laugh at this a twelvemonth hence. - Shak.

Noun

1.

twelvemonth - a period of time containing 365 (or 366) days; "she is 4 years old"; "in the year 1920" Synonyms: year, yr

365 days, 366 days, annum, bissextile year, calendar year, Christian year, church year, civil year, common year, decade, decennary, decennium, financial year, fiscal year, Holy Year, intercalary year, leap year, New Year, off year, period, period of time, time period, Y2K, year, year of grace, yr