noun: (law) Abbreviation of annual. [An annual publication; a book, periodical, journal, report, comic book, yearbook, etc., which is published serially once a year, which may or may not be in addition to regular weekly or monthly publication.]
noun: (in bibliographies) Abbreviation of annotated.
noun: Abbreviation of annum. [(uncommon) A one-year period, particularly (finance) a fiscal year or (sciences) a Julian year of exactly 365.25 days.]