| Noun | 1. | sapphire - a precious transparent stone of rich blue corundum valued as a gemstonestar sapphire - a sapphire that when cut shows a star-like figure in reflected light because of its crystalline structure transparent gem - a gemstone having the property of transmitting light without serious diffusion | |
| 2. | sapphire - a transparent piece of sapphire that has been cut and polished and is valued as a precious gem | |
| 3. | sapphire - a light shade of blueblue, blueness - the color of the clear sky in the daytime; "he had eyes of bright blue" | |
| Adj. | 1. | sapphire - having the color of a blue sapphire; "sapphire eyes"chromatic - being or having or characterized by hue | |