twelvemonth

/ˌtwɛlvˈmʌnθ/

Other forms: twelvemonths

Definitions of twelvemonth

1. noun

   a period of time containing 365 (or 366) days
   synonyms: year, yr

   types:

   Christian year, church year

   the year in the ecclesiastical calendar; especially feast days and special seasons

   Holy Year

   (Roman Catholic Church) a period of remission from sin (usually granted every 25 years)

   New Year

   the calendar year just begun

   365 days, common year

   a year that is not a leap year

   366 days, bissextile year, intercalary year, leap year

   in the Gregorian calendar, a year with 366 days that occurs every four years with February 29 being the extra day

   off year

   a year in which no major political elections are held

   off year

   a year in which productivity is low or inferior

   calendar year, civil year

   the year (reckoned from January 1 to December 31) according to Gregorian calendar

   financial year, fiscal year

   any accounting period of 12 months

   annum

   (Latin) year

   year of grace

   any year of the Christian era

   Y2K

   the year 2000 in the Gregorian calendar

   date

   the particular day, month, or year (usually according to the Gregorian calendar) that an event occurred

   type of:

   period, period of time, time period

   an amount of time