Denshi Jisho — Online Japanese dictionary

下さる くださる to give; to confer
Common word, Godan verb - aru special class, Honorific or respectful language 

You can also

Look up kanji details for 下さる.

Try a Yahoo Jisho search for 下さる .
Try a Goo Jisho search for 下さる .
Try a Google search for 下さる .