Definition of Y2K in US English:
 Y2K
abbreviationˌwīˌto͞oˈkāˌwaɪˌtuˈkeɪ
The year 2000.
 Example sentencesExamples
-  Darnell convinces the gang to believe that Y2K will signal the end of the world and they, happily, will be the last people on Earth.
 -  I have a friend who is convinced that the Y2K bug is going to kill cars dead in their tracks.
 -  Certain files on your hard drive, such as spreadsheets and databases, may be vulnerable to Y2K problems.
 -  The anxiety about the Y2K situation is reaching an increasingly feverish pitch in most large organizations.
 -  Thus, the main problem of Y2K is the problem of incorrect results when date mathematics are conducted.
 -  Well, here we are several years after Y2K and we now know, that at midnight, January 1, 2000, very little changed.