1.to be a witness, to bear witness, give evidence, bear testimony, Simon., etc.: c. dat. pers. to bear witness to or in favour of another, Hdt., attic; μαρτυρέει μοι τῆι γνώμηι bears witness to my opinion, Hdt.
2.c. acc. rei, to bear witness to a thing, testify it, Soph., etc.
3.c. inf. to testify that a thing is, id=Soph.; τίς σοι μαρτυρήσει κλύειν; who will bear thee witness that he heard..? id=Soph.
4.c. acc. cogn., μ. ἀκοήν to give hearsay evidence, Dem.:—so in Pass., μαρτυρίαι μαρτυρηθεῖσαι id=Soph.
5.Pass. also impers., μαρτυρεῖται testimony is borne, Plat.; οἶδα μαρτυρήσεσθαι I know that testimony will be given, Xen.