Available Definitions:
1) superl. - Ready and quick to act as occasion demands; meeting requirements readily; not slow, dilatory, or hesitating in decision or action; responding on the instant; immediate; as, prompt in obedience or compliance; -- said of persons.
2) superl. - Done or rendered quickly, readily, or immediately; given without delay or hesitation; -- said of conduct; as, prompt assistance.
3) superl. - Easy; unobstructed.