annum
nounEtymology From Latin per annum (“yearly”), from annus (“year”).
› Synonym of year.
1
Uncommon A one-year period, particularly (finance) a fiscal year or (sciences) a Julian year of exactly 365.25 days.
2
Astronomy, Literature, Media, Natural sciences, Publishing, Science fiction Uncommon A "year" determined by the revolution of an extraterrestrial planet.
- Derived terms
- kiloannum, mega-annum, giga-annum