Denshi Jisho — Online Japanese dictionary

性別 せいべつ distinction by sex; sex; gender
Common word, Noun 
性別並びに国籍 せいべつならびにこくせき sex and nationality
Noun 
性別役割分業 せいべつやくわりぶんぎょう division of labor by gender role
Noun 

You can also

Look up kanji details for 性別.

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