This article, through presentation of case studies, defines differences and suggests separate definitions for the terms cosmetic dentistry and esthetic dentistry. Dentistry strives to emulate harmonious form and function for therapy, and modification of appearance is an integral part of dental treatment. Cosmetic dentistry suggests a certain accommodation and is a compromise of current technology. Cosmetic dentistry is commonly selected as an interim procedure that does not necessarily function ideally and does not always emulate the pristine state of a natural dentition. Esthetic dentistry requires less accommodation, incorporates acceptable biologic technology for long-term survival, functions suitably, and mimics the pristine state of the natural dentition. Cosmetic and esthetic dentistry are different in definition, concept, and execution.