from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Zero; nothing.
- n. A person regarded as being insignificant; a nonentity.
- adj. Amounting to nothing; nil: "Business was zilch” ( New York).
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. nothing.
- adj. nothing; zero
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a quantity of no importance
Perhaps from alteration of z(ero) + (n)il.(American Heritage® Dictionary of the English Language, Fourth Edition)
Related to creative origin of Mr. Zilch in Ballyhoo, 1930's humor magazine. (Wiktionary)