[MrDrEsq]

i think what you're looking for is a kanji dictionary.
this one is good
Amazon.com: The Kanji Dictionary: Mark Spahn, Wolfgang Hadamitzky: Books
and this one is my personal favorite
Amazon.com: Kanji & Kana Revised Edition: A Guide to the Japanese Writing System (Tuttle Language Library): Wolfgang Hadamitzky, Mark Spahn: Books

did you get the difference between On and Kun?