Lewis Short
(verb) : ex-purgo, āvi, ātum, 1
* To purge, cleanse, purify (class.).
* Lit.: dolabella quicquid emortuum est (trunci aut vitis),Col. 4, 24, 5: capisterio quicquid exteretur,id. 2, 9, 1: lepras, psoras, lichenas, lentigines,Plin. 23, 7, 64, § 126.—Poet.: quae poterunt umquam satis expurgare (me) cicutae? i. e. to cure of poetic ecstasy, * Hor. Ep. 2, 2, 53: vetus fermentum,remove by cleansing,Vulg. 1 Cor. 5, 7.
* Trop.: expurgandus est sermo, * Cic. Brut. 74, 258.
* In partic., to clear from censure, to exculpate, vindicate, justify, excuse: me expurgare tibi volo,Plaut. Capt. 3, 4, 87; id. Mil. 2, 6, 17: sine me expurgem,Ter. And. 5, 3, 29; id. Hec. 5, 1, 16: non facile est expurgatu,id. ib. 2, 3, 4: sese parum expurgat,fails to vindicate,Sall. J. 69, 4: requirens objecta et expurgaturum asseverans,Tac. A. 16, 24: fidem consiliumque publicum,Gell. 7, 3, 5.—Hence, P. a.: expurgātus, a, um, pure, clear; comp.: mens,Rufin. Orig. de Princ. 1, 1, 7.
Charlton T. Lewis, Charles Short, A Latin Dictionary