Katie Couric's Notebook: Words

We've all done it -- misheard the lyrics of a song. Well, now there's a word for that: Mondegreen. It comes from an old Scottish ballad with the lyric "laid him on the green" which countless people thought was "Lady Mondegreen."

"Mondegreen" is one of about 100 new words being added to the Webster's Collegiate Dictionary. For more - and their meanings - just click on my Notebook.