Main Entry:

tes·ti·fy

Pronunciation:

\ˈtes-tə-ˌfī\

Function:

verb

Inflected Form(s):

tes·ti·fied; tes·ti·fy·ing

Etymology:

Middle English testifien, from Anglo-French testifier, from Latin testificari, from testis witness

Date:

14th century

intransitive verb1 a: to make a statement based on personal knowledge or belief : bear witness b: to serve as evidence or proof2: to express a personal conviction3: to make a solemn declaration under oath for the purpose of establishing a fact (as in a court)transitive verb1 a: to bear witness to : attest b: to serve as evidence of : prove2archaic a: to make known (a personal conviction) b: to give evidence of : show3: to declare under oath before a tribunal or officially constituted public body

— tes·ti·fi·er \-ˌfī(-ə)r\ noun