Definition of epact Epact
e•pact
We found 3 definitions of epact from 3 different sources.
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What does epact mean?
Wiktionary 
- epact (Noun)
The time number of days by which a solar year exceeds twelve lunar month s; it is used in the calculation of the date of Easter.
Webster DictionaryWebster's Unabridged Dictionary 📘
- epact (n.)
The moon's age at the beginning of the calendar year, or the number of days by which the last new moon has preceded the beginning of the year.
Chambers DictionaryChamber's 20th Century Dictionary 📕
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epact
ē′pakt, n. the moon's age at the beginning of the year: the excess of the solar month or year above the lunar: (pl.) a set of nineteen numbers used for fixing the date of Easter and other church festivals, by indicating the age of the moon at the beginning of each civil year in the lunar cycle. [Fr.,—Gr. epaktos, brought on—epi, on, agein, to bring.]
