Check out this cool dictionary: http://www.romajidesu.com/dictionary.php

To look for meaning of Japanese word and example sentences, you only need to type in a single input! And as before, you can type in Original Japanese, or Hiragana, or Romaji, or English! The result page now may contains up to two tabs: Words (definition) and Sentences (examples contain the searched word). Each record of examples sentences is beautifully rendered with clickable word and hiragana pronunciation if available (Furigana style).