1. A clear hard variety of corundum used as a gemstone that is usually blue but may be any color except red.
2. A corundum gem.
3. the blue color of a gem sapphire.
4. made of or resembling a gem sapphire.
5. having the color of a blue sapphire.

1. a clear deep blue variety of corundum, valued as a precious stone.
2. a white, yellow, or purple variety of corundum, either clear or translucent.
3. a deep blue colour.
4. a type of south american hummingbird.
5. of a deep blue colour.

1. of or resembling sapphire; sapphirine; blue.
2. native alumina or aluminium sesquioxide, Al2O3; corundum; esp., the blue transparent variety of corundum, highly prized as a gem.
3. the color of the gem; bright blue.
4. any humming bird of the genus Hylocharis, native of south america. the throat and breast are usually bright blue.

1. A precious stone next in hardness to the diamond, and nearly as valuable when of fine quality: a variety of the mineral corundum.
2. the color of the sapphire; blue.
3. in heraldry, a tincture, the color blue, in blazoning by means of precious stones. compare blazon, n., 2.
4. in ornithology, a sapphirewing.
5. resembling sapphire; of a deep brilliant blue.

1. a transparent piece of sapphire that has been cut and polished and is valued as a precious gem
2. a light shade of blue
3. a precious transparent stone of rich blue corundum valued as a gemstone
4. of something having the color of a blue sapphire