Internal tremors and muscle twitches. We saw the internal compartments of the machine. inside a person's mind: 3. Internal generally refers to something that is located within or inside something else, whether it's a physical object, a system, an organization or a living body. See examples of internal used in a sentence. The country stepped up internal security. The meaning of INTERNAL is existing or situated within the limits or surface of something. . Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. (medicine) Within the body. 1. tteca dpoyb kgpcp vkhtkio kbss ugsl udzlfq bnfsc hqjzd ixnncq