Try wikipedia:
http://en.wikipedia.org/wiki/Samurai
Or try Breen's Eng-Japanese dictionary or try goo.ne.jp's dictionary. Both are credible sources. Breen's gives you this:
"Matches for: 檦士
No matches were found for this key!
Another E->J Srch
J->E Srch
WWWJDIC home "
I think you are out of luck on this one, unless by chance it means Samurai in Chinese or something. Though I never knew the Chinese had a word for such a natively Japanese concept.
Oh and the real "samurai.biz" is still open to reg