1. existing or occurring inside something; within the body, mind, or organization
2. relating to the domestic affairs of a country rather than foreign relations
3. existing only in the mind; not expressed outwardly

Examples

• The doctor examined her internal organs with an ultrasound.
• The company is conducting an internal investigation into the security breach.
• He kept his internal struggles hidden from his friends.
• The country focused on internal affairs rather than foreign policy.
• The building’s internal temperature is controlled by a central system.
• She had an internal debate about whether to accept the job offer.
• The internal structure of the molecule was complex.