internal

adjective

• 1of or situated on the inside:the tube had an internal diameter of 1.1 mm
• inside the body:internal bleeding
• existing or occurring within an organization:an internal telephone system
• relating to affairs and activities within a country rather than with other countries; domestic:internal flights
• experienced in one’s mind; inner rather than expressed:internal feelings
• of the inner nature of a thing; intrinsic:the party suffered from grave internal weaknesses

• 2British (of a student) attending a university as well as taking its examinations.

noun

• inner parts or features:all the weapon’s internals are well finished and highly polished