Definition of Vain

Adjective: vain (vainer,vainest) veyn

Characteristic of false pride; having an exaggerated sense of self-importance
"vain about her clothes";
- conceited, egotistic, egotistical, self-conceited, swollen, swollen-headed, puffed-up, swellheaded [N. Amer]
Unproductive of success
"a vain attempt";
- bootless, fruitless, futile, sleeveless