the feeling of wanting or needing a drink [↪ thirsty, hunger]:
Ice water is the only thing that really quenches my thirst (=gets rid of it).
We had worked up a thirst (=done something that made us thirsty), and so we decided to stop for a beer.
Maggie woke up with a raging thirst (=an extremely strong thirst).
the state of not having enough to drink:
Many of the animals had died of thirst.
a strong desire for knowledge etc:
the thirst for knowledge in Renaissance Italy