Marathi is a difficult language. It is as easy as it is difficult! Learning Marathi is also both easy and difficult. Learning Marathi words in a Marathi dictionary is difficult. Let me make it easy for you...and, er, for myself.
Excellent Marathi dictionaries are available on the Web for free. They are amazing. You do not have to thumb through them. Search facilities are excellent. You can learn a lot. An attempt to provide links to the best Marathi dictionaries on Internet. Bonus...links to those on cell phone.