from The American Heritage® Dictionary of the English Language, 4th Edition
- adv. Informal Without delay; quickly.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adv. Quickly, soon, promptly.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adv. in a punctual manner
Spanish, from Latin prōmptus; see prompt.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Spanish pronto (Wiktionary)