Lewis Short
(adjective) : annĭversārĭus, a, um, annusverto
* That returns, happens, is used, etc., every year, returning or renewed annually, annual, yearly: sacra,Cic. Verr. 2, 4, 39: Ecce solemnitas Domini est in Silo anniversaria,Vulg. Jud. 21, 19: festi dies,Cic. Verr. 2, 4, 48 fin.: (caeli) vicissitudines,the changes of the seasons of the year,id. N. D. 2, 38, 97; Varr. R. R. 1, 16, 4: arma,Liv. 4, 45; so, hostes,Flor. 1, 12: valetudines,Suet. Aug. 81: pervigilium,id. Galb. 4 al.—Adv.: annĭversārĭē, annually, Aug. Ep. 118 fin.
Charlton T. Lewis, Charles Short, A Latin Dictionary