Definition of vain (adjective)
- characteristic of false pride; having an exaggerated sense of self-importance
- "a conceited fool"; "an attitude of self-conceited arrogance"; "an egotistical disregard of others"; "so swollen by victory that he was unfit for normal duty"; "growing ever more swollen-headed and arbitrary"; "vain about her clothes"
- synonyms: conceited, egotistic, egotistical, self-conceited, swollen, swollen-headed
- unproductive of success
Source: Princeton University Wordnet