Denshi Jisho — Online Japanese dictionary

うろうろ loiteringly; aimless wandering
Common word, Adverb, Noun, Suru verb, Onomatopoeic or mimetic word 

You can also

Try a Yahoo Jisho search for うろうろ .
Try a Goo Jisho search for うろうろ .
Try a Google search for うろうろ .