1. necessary or constituent: forming an essential part of something Adequate funding is integral to the success of the venture. Mealtimes are an integral part of family life.
2. made up of parts: composed of parts that together make a whole
3. complete: having no missing parts
4. mathematics of integer: relating to an integer
5. mathematics relating to integrals: relating to definite integrals, indefinite integrals, or integration
