Simple Definition of authenticate
: to prove that something is real, true, or genuine : to prove that something is authentic
Examples of authenticate in a sentence
The signature has been authenticated.
<a jeweler authenticated the diamond as real>
First Known Use of authenticate
Synonym Discussion of authenticate
AUTHENTICATE Defined for Kids
Definition of authenticate for Students
: to prove or serve as proof that something is authentic
Legal Definition of authenticate
1 : to prove or serve to prove that (something) is genuine; especially : to prove that (an item of evidence) is genuine for the purpose of establishing admissibility
2 : to make (a written instrument) valid and effective by marking especially with one's signature <authenticate a check>
Seen and Heard
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