v.
Pronunciation: ' tes-t ə - ˌ f ī
Function: verb
Inflected Form: -fied ; -fy · ing
Etymology: Middle English testifien, from Anglo-French testifier, from Latin testificari, from testis witness
Date: 14th century
intransitive verb
1 a : to make a statement based on personal knowledge or belief : bear witness b : to serve as evidence or proof
2 : to express a personal conviction
3 : to make a solemn declaration under oath for the purpose of establishing a fact (as in a court)
transitive verb
1 a : to bear witness to : ATTEST b : to serve as evidence of : PROVE
2 archaic a : to make known (a personal conviction) b : to give evidence of : SHOW
3 : to declare under oath before a tribunal or officially constituted public body
– tes · ti · fi · er \ - ˌ f ī (- ə )r \ noun