lack of food, especially for a long period of time, that can cause illness or death [= starvation]
die of/from hunger
Thousands of people are dying from hunger every day.
the feeling that you need to eat [↪ thirst]:
Try to satisfy your hunger by eating some fruit.
hunger pangs (=sudden feelings of being hungry)
3 [singular, uncountable]
a strong need or desire for something
her hunger for knowledge
a hunger for success