Denshi Jisho — Online Japanese dictionary

four (used in legal documents)
Numeric 
しし store; market storehouse
Noun 
しょし bookstore; bookshop
Noun 
ほうし licentious; self-indulgent
Na-adjective 
きょうし being proud and self-willed
Noun 

You can also

Look up kanji details for *肆.

Try a Yahoo Jisho search for *肆 .
Try a Goo Jisho search for *肆 .
Try a Google search for *肆 .