| 1. | something rare, unusual, or uncommon: Snowstorms are a rarity in the South. |
| 2. | something esteemed or interesting in being rare, uncommon, or curious: That folio is a rarity that will bring a good price. |
| 3. | the state or quality of being rare. |
| 4. | rare occurrence; infrequency: Volcanic eruptions on the island occur with great rarity. |
| 5. | unusual excellence. |
| 6. | thinness, as of air or a gas. |