I was about to come in here and complain about WoW players trying to change the meaning of words to what they think they should be, but I see enough people have commented to that effect.
As mentioned in one of the earlier posts in this thread, a raid is something that can be undertaken by a minimum of 1 person and is not defined by numbers.
Please, no more stupid comments like "OMG, the dictionary has changed the meaning of a word I use in WoW! WoW was here before the english language and therefore must take priority!". Seriously, sometimes I hear people use words in games and think they just pulled a word out of their arse and decided to give it a new meaning to suit whatever they want it to mean.
