Answer:
Epidemic.
Step-by-step explanation:
Pestilence is a fatal disease or infliction that is suffered in a large part of the land. It is a type of plague that hurts, damaged, and even kills a large number of people.
In the given lines from scene I of Oedipus, The King, we see the people Thebes suffering a great pestilence which has wreaked havoc among them. The given speech is said by King Oedipus to the blind seer/ prophet Teiresias, asking his opinion and help to catch the murderer of Laios so as to end the suffering inflicted upon his people.
Thus, the word "pestilence" means an epidemic that the gods had inflicted upon the people of Thebes.