LSJ Gloss:ἐξορκιστήςan exorcistDodson:ἐξορκιστήςan exorcistan exorcist, a caster out of evil spirits by the use of names or spells.
Strong's:ἐξορκιστής one that binds by an oath (or spell), i.e. (by implication) an "exorcist" (conjurer)Derivation: from G1844;KJV Usage: exorcist. G1844
TBESG:ἐξορκιστήςexorcistG:N-M ἐξ-ορκιστής, -οῦ, ὁ (< ἐξορκίζω), __1. one who administers an oath. __2. an exorcist: Act.19:13.† (AS)
Thayer:1) he who extracts an oath of one 2) an exorcist 2a) one who employs a formula of conjuration for expelling demons
ἐξορκιστής exorkistēs ex-or-kis-tace' From G1844; one that binds by an oath (or spell), that is, (by implication) an “exorcist” (conjurer)KJV Usage: exorcist.
ἐξορκίζω exorkizō ex-or-kid'-zo From G1537 and G3726; to exact an oath, that is, conjureKJV Usage: adjure.