testify
verb
tes·ti·fy
ˈte-stə-ˌfī 
testified; testifying
1
: to make a solemn declaration under oath for the purpose of establishing a fact (as in a court)
2
a
: to make a statement based on personal knowledge or belief : bear witness
b
: to serve as evidence or proof
3
: to express a personal conviction
2
: to declare under oath before a tribunal or officially constituted public body
3
Examples of testify in a Sentence
She refused to testify about who had given her the information.
She testified before Congress today.
He agreed to testify against his drug dealer.
He testified that he'd seen two people leave the building on the night of the murder.
These statistics testify that the program is working.
Several people testified during the revival meeting.
Recent Examples on the Web
Notably, his ex-girlfriend Cassie Ventura, whose landmark lawsuit in November 2023 initiated the mogul’s downfall, will testify under her real name as Victim-1.
—
Demicia Inman, VIBE.com, 2 May 2025
Haley is one of three women who are testifying in Weinstein’s retrial in New York City, which began on Wednesday, April 23.
—Christine Pelisek, People.com, 2 May 2025
Jennifer McCabe, a friend of O'Keefe who had testified during the first trial, took to the stand for the third day during the retrial on Friday in Dedham, Massachusetts.
—Meredith Deliso, ABC News, 2 May 2025
The ruling is significant in this case as prosecutors will bring alleged victims of Diddy to testify about abuse, and defense attorneys will try to dispute their statements.
—Hannah Yasharoff, USA Today, 1 May 2025
See All Example Sentences for testify
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Demicia Inman, VIBE.com, 2 May 2025
Haley is one of three women who are testifying in Weinstein’s retrial in New York City, which began on Wednesday, April 23.
—Christine Pelisek, People.com, 2 May 2025
Jennifer McCabe, a friend of O'Keefe who had testified during the first trial, took to the stand for the third day during the retrial on Friday in Dedham, Massachusetts.
—Meredith Deliso, ABC News, 2 May 2025
The ruling is significant in this case as prosecutors will bring alleged victims of Diddy to testify about abuse, and defense attorneys will try to dispute their statements.
—Hannah Yasharoff, USA Today, 1 May 2025
See All Example Sentences for testify
Cite this Entry
“Testify.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/testify. Accessed 9 May. 2025.
Copy CitationKids Definition
testify
verb
tes·ti·fy
ˈtes-tə-ˌfī
testified; testifying
1
a
: to make a statement based on personal knowledge or belief
could testify to the student's devotion to her studies
b
: to make a formal statement of what one swears is true
testified in court
2
: to give outward proof : serve as a sign of
yawns testifying to fatigue
Legal Definition
testify
verb
tes·ti·fy
ˈtes-tə-ˌfī
testified; testifying
: to make a solemn declaration under oath or affirmation for the purpose of establishing a fact : give testimony
: to declare in testimony
testifier
noun
Etymology
Latin testificari, from testis witness
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