## Definition of *Vain*
**Vain** refers to having or showing excessive pride in one’s appearance, qualities, or achievements. The word often describes a person who is conceited or self-admiring to an unreasonable degree.
### Example Usage
> "She was too vain to admit her mistakes."
### Additional Meanings
- Describes something without result or success: *a vain attempt*.
- Refers to something that lacks real value or significance: *vain words*.
- Can also express futility: *His efforts were in vain.*
### Origin and Grammar
Derived from the Latin *vanus*, meaning *empty or worthless*, the term entered English through Middle French. It mainly functions as an adjective.
### Related Forms
- **Vainly** (adverb): in a vain or unsuccessful manner.
- **Vainness** (noun): the quality of being vain or conceited.
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**Author Summary:** The word *vain* conveys excessive self-pride or a sense of futility, originating from Latin roots that mean “empty” or “without effect.”
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Merriam-Webster — 2025-11-24