A set of characteristics which distinguish a concept and its subtypes from all other concepts.
The following set of assertions is a sufficient definition for 74400008 | appendicitis (disorder)| because any concept for which this set of assertions is true must either be the disorder appendicitis or a subtype of appendicitis.
Both the following sets of assertions are sufficient definitions for the concept 8801005 | Secondary diabetes mellitus (disorder)| :
Prior to July 2018, SNOMED CT could only support one sufficient definition for each concept could not represent the 8801005 | Secondary diabetes mellitus (disorder)| example above. A further limitation, that also prevented formal representation of that example was the stated relationship file was only able to represent necessary conditions.