v. [CO- 1.] trans. To attest together or in conjunction (with). So Co-attestation, Co-attestator.
1650. Elderfield, Tythes, 297. He must know this, and will I believe give it in co-attestation.
1708. Misc. Curiosa, II. 7. The same Relation is Coattested by Nine other several Successions if we suppose a Coattestation of Nineteen, the Credibility of it will be, as above Two Millions to One.
a. 1711. Ken, Hymns Festiv., Poet. Wks. 1721, I. 264. That heavnly Paraclete With Conscience co-attests our Zeal.
1810. Bentham, Packing (1821), 232. Established by an affidavit, with or without co-attestators.