This is the 5129th most frequent Dutch word.
internationale
"Internationale" means "international" in English.
The word 'internationale' is used here as an adjective modifying the noun 'conferentie', describing its global scope.
De internationale conferentie vindt plaats in Amsterdam.
The international conference takes place in Amsterdam.
In this sentence, 'internationale' acts as an adjective for the noun 'luchthaven', attributing a characteristic of being globally connected.
Onze stad heeft een internationale luchthaven.
Our city has an international airport.
Here, 'internationale' functions again as an adjective, providing information that the 'organisatie' operates or has reach on an international scale.