DictionarytwelvemonthPeriod of twelve months
noun

twelvemonth

TWELV-munth/ˈtwelvmʌnθ/

A period of twelve months.

The lease runs for a full twelvemonth from today.

Twelve small calendar leaves arranged in a circle are numbered 1 through 12 exactly once, one full year.
Etymology

Twelf and monað make a literal “twelve months.” A month originally measured the interval from one new moon to the next; the compound names the twelve-month span of a calendar year.

In context

Ion Books462:01
when she hardly knew what money meant, she had promised Miss Macnulty seventy pounds for the first year, and seventy for the second, should the arrangement last longer than a twelvemonth.
The Eustace Diamonds by Anthony Trollope - Part 1/3 | Full Audiobook with Scrolling Text

More examples

  • She spends a twelvemonth abroad before returning home.
  • Two twelvemonths pass before the next family reunion.
  • We have not seen each other for a twelvemonth.

Forms

twelvemonth · twelvemonths

Similar words

year
The usual modern word for a twelve-month period.