1.Mid to call to witness, attest, invoke, Soph., Eur., etc.; c. part., μαρτύρομαι τυπτόμενος I call you to witness that I am being beaten, Ar.
2.c. acc. rei, to call one to witness a thing, Hdt., Ar.
3.to protest, asseverate, μ. ὅτι . . Ar., etc.; absol., μαρτύρομαι I protest, id=Ar., Thuc.