Definitions of Medical Informatics

Medical Informatics comes with a whole string of definitions, colored and shaded by the definer's background, viewpoint and preoccupation. The following definitions have been arranged chronologically:

Medical informatics is the application of computers, communications and information technology and systems to all fields of medicine - medical care, medical education and medical research.
MF Collen, MEDINFO '80, Tokyo

Medical informatics is a developing body of knowledge and a set of techniques concerning the organizational management of information in support of medical research, education, and patient care.... Medical informatics combines medical science with several technologies and disciplines in the information and computer sciences and provides methodologies by which these can contribute to better use of the medical knowledge base and ultimately to better medical care.
Association of American Medical Colleges, 1986

Informatics is the field concerned with the cognitive, information processing, and communication tasks of medical practice, education, and research, including the information science and technology to support these tasks. Greenes and Shortliffe JAMA 263: 1114-1120, 1990

Informatics is the science underlying the acquisition, maintenance, retrieval, and application of biomedical knowledge and information to improve patient care, education, research and administration.
Charles Friedman, Center for Biomedical Informatics: Introductory Lecture Series, Medical Informatics: Challenges and Opportunities, 1996

Medical Informatics is the branch of science concerned with the use of computers and communication technology to acquire, store, analyze, communicate, and display medical information and knowledge to facilitate understanding and improve the accuracy, timeliness, and reliability of decision-making.
Warner, Sorenson and Bouhaddou, Knowledge Engineering in Health Informatics, 1997

Medical Informatics (MI) is the science of computer optimization of the transfer and interpretation of clinical data. It has a special emphasis on analyzing and supporting the medical decision-making process.
From the DISTANCE LEARNING course in INTRODUCTORY MEDICAL INFORMATICS of the SCHOOL of PUBLIC HEALTH, Department of BIOMETRY and STATISTICS, of the University at Albany, Albany NY

With all these definitions, you can probably come up with your own too.