(adj.adv.) : lūsōrĭus, a, um, adj.lusor
* Of or belonging to a player.
* Lit.: pila,a playing-ball,Plin. 7, 56, 57, § 205: alveus cum tesseris,id. 37, 2, 6, § 13.—Hence
* Subst.: lūsōrĭum, ii, n., a place where shows of gladiators and wild beasts were given: statuit sibi triclinium in summo lusorio,Lampr. Heliog. 25; Lact. Mort. Persecut. 21.
* Trop.
* That serves for amusement or pastime, sportive: quaestio,Plin. 7, 53, 54, § 180: arma,Sen. Ep. 117, 25: spectaculum non fidele et lusorium,id. ib. 80, 2.
* Transf., that is done or given in play; hence, empty, ineffectual, invalid, = irritus: nomen,Sen. Ben. 5, 8, 3: lusorias minas alicui facere,Dig. 35, 3, 4: imperium,ib. 43, 8, 1.—Hence, adv.: lūsōrĭē, playfully, in sport, not in earnest, apparently: lusorie (causam) agens,Dig. 30, 1, 50, § 1.

s. TLL