"Air"

http://www.bmezine.com/tattoo/A50523/high/bmegl068697.jpg

The top character 空 is correct and means "empty, hollow, bare, deserted". The center character appears to be a Japanese katakana, may be either シ or ツ. The bottom character is incorrectly written 氣 or 気, which means "air, gas, steam, vapor; spirit".

空氣 (空気) = air; atmosphere