ann.

(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.]

Abbreviation of annum. [Synonym of year.]

(bibliography) Abbreviation of annotated. [Containing, or accompanied by annotations or labelled notes.]

(chiefly genealogy, of a marriage) Abbreviation of annulled. [cancelled or void]