For people using *nix-based systems, chances are there is an installed program which makes use of Jim Breen's EDICT, as well as KANJIDIC.
For anyone using KDE, there is a pretty capable application, called Kiten (http://edu.kde.org/kiten/); for GNOME users, there are two programs, one of them is Gjiten (http://gjiten.sourceforge.net/) and gWaei (http://sourceforge.net/projects/gwaei/), the latter more promising and actively developed.
Another helpful resource
For people using *nix-based systems, chances are there is an installed program which makes use of Jim Breen's EDICT, as well as KANJIDIC.
For anyone using KDE, there is a pretty capable application, called Kiten (http://edu.kde.org/kiten/); for GNOME users, there are two programs, one of them is Gjiten (http://gjiten.sourceforge.net/) and gWaei (http://sourceforge.net/projects/gwaei/), the latter more promising and actively developed.