to bear witness to; certify; declare to be correct, true, or genuine; declare the truth of, in words or writing, especially affirm in an official capacity: to attest the truth of a statement.
2.
to give proof or evidence of; manifest: His works attest his industry.
3.
to put on oath.
verb (used without object)
4.
to testify or bear witness (often followed by to ): to attest to the reliability of an employee.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a gadget; dingus; thingumbob.
a stew of meat, vegetables, potatoes, etc.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
1540s, from M.Fr. attester, from O.Fr. atester (13c.) "affirm, attest," from L. attestari "confirm," lit. "bear witness to," from ad- "to" + testari "bear witness," from testis "witness" (see testament).