The EDICT Dictionary File

http://www.edrdg.org/jmdict/edict.html

EDICT is a Japanese-English Dictionary file.

和英辞典ファイルのダウンロード。
漢字の辞書もある。

KANJIDIC2 HOME PAGE

http://www.edrdg.org/kanjidic/kanjd2index.html

The KANJIDIC2 project has as its aim the production of a consolidated XML-format kanji database combining the information currently in the KANJIDIC (6,355 kanji from JIS X 0208) and KANJD212 (5,801 kanji from JIS X 0212) files (overview) (documentation), and adding information about the additional 952 kanji in JIS X 0213. (2,743 kanji are in both JIS X 0212 and JIS X 0213.)

漢字とその意味（英語）の辞書。