«وإن كان بالجنس القريب والخاصة يسمى رسماً تاماً»
If the definition uses the proximate genus and a property, it is called a complete descriptive definition.
Example: الإنسان حيوان ضاحك
The human is an animal capable of laughter.
“Animal” is the proximate genus and “capable of laughter” is a property. The genus situates the species in its class and the property gives a distinctive mark.
It is descriptive because it uses a property rather than an essential differentia, and complete because it includes the proximate genus.