v. (-ies, -ied) 1 intr. (of a person or thing) bear witness (testified to the facts). 2 intr. Law give evidence. 3 tr. affirm or declare (testified his regret; testified that she had been present). 4 tr. (of a thing) be evidence of, evince. testifier n.
[ ME f. L testificari f. testis witness ]