Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
laurĕātus, a, um, adj. [laurea], crowned or decked with laurel, laureate: imago, Cic. Mur. 41, 88: lictores, id. Att. 7, 10, 1: fasces, id. Div. 1, 28, 59: legiones, Liv. 45, 39: litterae, a letter announcing a victory (so called because bound up with bay-leaves), a laurelled letter, id. 45, 1: litterae a Postumio laureatae sequuntur, id. 5, 28 fin.: tabellae, id. 45, 1.
Subst.: laurĕātae, ārum (sc. litterae), a letter announcing a victory: ne laureatis quidem gesta prosecutus est, Tac. Agr. 18 fin.; cf. laurus.