1. proving or verifying that something is genuine, real, or true
Usage: present participle of authenticate; commonly used in security and technology contexts
2. establishing the identity or legitimacy of a person or system, especially through credentials or passwords
Usage: technical usage in computing and security

Examples

• The museum is authenticating the painting to determine if it is a genuine Rembrandt.
• She is authenticating her identity by entering her password and two-factor code.
• The lab is authenticating the document by analyzing the ink and paper.
• Before accessing the account, the system requires authenticating your credentials.
• They are authenticating the antique furniture through expert examination.
• The process of authenticating users helps protect the company's data from unauthorized access.