1. excessively proud of or concerned about one's own appearance, qualities, achievements, etc.; conceited: a vain
dandy.
2. proceeding from or showing
pride in or concern about one's appearance, qualities, etc.; resulting from or displaying vanity:
He made some vain remarks about his accomplishments.
3. ineffectual or unsuccessful; futile:
vain hopes; a vain effort; a vain
war.
4. without real significance, value, or importance; baseless or worthless:
vain pageantry; vain display.
5. Archaic. senseless, narcissistic, or foolish.