Definitions:

1. Excessive or boastful pride in one's own achievements, appearance, or qualities, especially when it's unwarranted or superficial. NOUN
   • The knight's downfall came from his vainglory, not the enemy's sword.
2. Outspoken conceit. NOUN
   • He paraded his wealth around town out of sheer vainglory.

Synonyms:

• arrogance
• boastfulness
• conceit
• pride
• self-glorification
• vanity