あれば

What does the Japanese word "areba" mean?

www.guidetojapanese.org <-- For people like >>10, >>5 and >>1, this website is good enough. By the time you master all of the content, you will know what to do next for sure.

And for a dictionary, you have to be stupid not to find one.
Here is one you can use with your browser: http://www.csse.monash.edu.au/~jwb/cgi-bin/wwwjdic.cgi
Here's a software one: http://www.physics.ucla.edu/~grosenth/jwpce.html

P.S. Are you really part of my generation?