Senses
夸父逐日 to have grand ambitions
(of a person) to have the determination and courage to conquer nature or achieve a great task, based on the myth of 夸父 in the 山海经
夸父逐日 to overestimate one's abilities
to attempt the impossible or overestimate one's own power, leading to failure, based on the myth of 夸父 in the 山海经