from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of or relating to the year 2000.
- adj. Of or relating to the Y2K bug: Y2K compliance; Y2K testing.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. : Abbreviation of year 2000.
- n. Y2K bug
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the year 2000 in the Gregorian calendar
Alteration of y(ear) 2000, from K, symbol for 1000.(American Heritage® Dictionary of the English Language, Fourth Edition)
Abbreviated from "year 2000", with "K" standing for 1000, as in the prefix kilo- (Wiktionary)