It's a recent change. I was weekly checking some online dictionaries and one day it was changed to include same-sex. Some folks have written the online dictionaries but they're more interested in some agenda or being PC than how the majority actually use and define the word marriage. I believe the change happened around the summer of 2003.
Thanks for that info.
Do you know if recent print version of the dictionary are the same way?
I am probably going to the book store today so I will check if noboby knows.