πρεσβευτής

οῦ, ὁ
A. ambassador, IG 12.22.27, Th. 5.4, Pl. Lg. 941a, POxy. 933.31 (ii A. D.), etc.: pl. πρεσβευταί is at first less freq., later more freq., than πρέσβεις, πρεσβευτὰς πάντας ὑμᾶς ἡμεῖς οἱ πρέσβεις ποιοῦμεν And. 3.41, cf. Th. 8.77 (interpol.), IG 22.858.6 (iii B. C.), 1224.26 (ii B. C.), Alciphr. 2.2.
II. agent or commissioner, ὑπέρ τινος D. 45.64.
2. = Lat. legatus, staff officer, etc., Plb. 35.4.5, Plu. Mar. 7, etc.; π. καὶ ἀντιστράτηγος, = legatus pro praetore, IG 14.1121, etc.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project