Denshi Jisho — Online Japanese dictionary

逃す のがす to let loose; to set free; to let escape; to miss
Common word, Godan verb with su ending, Transitive verb 

You can also

Look up kanji details for 逃す.

Try a Yahoo Jisho search for 逃す .
Try a Goo Jisho search for 逃す .
Try a Google search for 逃す .