Interdisciplinary is a term used to describe the blending of multiple areas of expertise, knowledge, or fields of study. There are a number of synonyms for the word 'interdisciplinary', including multi-disciplinary, cross-disciplinary, trans-disciplinary, and integrative. Multi-disciplinary refers to collaboration between two or more disciplines, while cross-disciplinary refers to the combination of two or more disciplines to solve a problem. Trans-disciplinary refers to integrating knowledge from a number of different sources to address a complex issue. Integrative focuses on the connection between disciplines where the emphasis is on understanding how knowledge from each field relates to and informs the others. All of these terms describe approaches that incorporate knowledge and expertise from a variety of disciplines.