Lexical Definition

‎εὐεργέτης‎ euergétēs (yoo-erg-et'-ace) benefactor ^G:N-M
from ‎εὖ‎ and the base of ‎ἔργον‎

benefactor.

• a worker of good, i.e. (specially) a philanthropist

Abbott-Smith

** εὐεργέτης, -ου, ὁ [in LXX: Es 8:13, Wi 19:14, II Mac 4:2, III Mac 3:19 6:24 * ;]
a benefactor: Lk 22:25 (for contemp. usage, v. Deiss., LAE, 248).†

Abbott-Smith References

Liddell-Scott-Jones

εὐεργέτης-ης

(Thess. εὐϝεργέτας [Refs 5th c.BC+], ου, ὁ, benefactor, [Refs 5th c.BC+]; τινι to one, [Refs 5th c.BC+]: more commonly with genitive, τῆς γῆς [Refs 5th c.BC+]

__2 as an honorary title, εὐ. βασιλέος ἀνεγράφη was registered as the King's benefactor, [Refs 5th c.BC+]; πρόξεινος καὶ εὐ. [NT+5th c.BC+]: conferred on kings and emperors, as Antigonus, [Refs 4th c.BC+]; ὁ παντὸς κόσμου σωτὴρ καὶ εὐ, of Trajan, [Refs]; σὺ ὁ εὐ., mode of address to a superior, [Refs 1st c.AD+]
__II as adjective, beneficent, bountiful, ἀνήρ [Refs 5th c.BC+]

_{LSJ Scripture Refs: Luke.22.25}