definierenden
Definierenden is the present participle form of the German verb definieren in a declined, attributive position. In standard usage it functions as an adjective or participial modifier and conveys that something serves to define or identify something else. In practice it appears most often in phrases describing essential or characteristic features, such as defining or defining-by-essence.
Grammatically, definierenden is declined like an adjective that originates from a participle. Its exact ending depends
Usage and nuance: definierenden marks a contrast between features that merely exist and those that function
See also: definieren, definierendes Merkmal, Merkmale, charakteristische Merkmale.