Examples of using "определённого" in a sentence and their english translations:
a particular resource;
a particular community that manages that resource;
There is nothing certain in the world.
That also requires a certain courage.
if you emit a certain amount of greenhouse gases.
He has the backing of a certain politician.
I like to walk aimlessly.
Nature prescribes homosexuality at specific times and places,
and we found that putting a certain amount in the water,
The heat turns off automatically when the room reaches a certain temperature.
Generalizations, in French, systematically require the definite article, unlike what happens with English, Esperanto or Portuguese...