COMPLEX definition: composed of many interconnected parts; compound; composite. See examples of complex used in a sentence. COMPLEX meaning: 1. involving a lot of different but related parts: 2. difficult to understand or find an answer to…. Learn more. Some common synonyms of complex are complicated, intricate, involved, and knotty. While all these words mean having confusingly interrelated parts, complex suggests the unavoidable result of a necessary combining and does not imply a fault or failure. This disambiguation page lists articles associated with the title Complex. If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article. Complex implies a combination of many interwoven parts: The composer transformed a simple folk tune into a complex set of variations. Complicated stresses a relationship of parts that affect each other in elaborate, often obscure ways: The party's complicated platform confused many voters. In general English, complex refers to something consisting of multiple parts, intricate or not easy to understand or analyze because of its various interconnected elements. COMPLEX definition: 1. involving a lot of different but related parts: 2. difficult to understand or find an answer to…. Learn more. complex, complicated, intricate, involved, knotty mean having confusingly interrelated parts. complex suggests the unavoidable result of a necessary combining and does not imply a fault or failure. Find the latest entertainment news and the best in rap music, pop and internet culture, sneakers, style and streetwear, and sports culture. Shop exclusive drops, including apparel, vinyl, posters, and more, available on Complex Shop.