1. An abbreviated form of lapis lazuli, a precious stone having the color of deep blue, and used especially in making jewelry.

Lapis was Jane’s favorite stone which she had arranged to have put into her new necklace.

2. A rich blue color originating from an albuminous mineral: Since Greg had eyes between the shades of violet and green, he also had a silk tie with hues of lapis, turquoise, and aquamarine.

1. A deep blue semi-precious stone which has been prized since antiquity for its opaque to translucent blue, violet-blue, or greenish-blue colors: A lapis lazuli has been described as a deep-blue mineral composed primarily of lazurite (a mineral with sulfate, sulfur, and chloride) which is used mainly as a gem or as a pigment (coloring powder).
2. Etymology: from Latin lapis. "stone" + lazuli, the genitive form of Medieval Latin lazulum; from Arabic lazaward, from Persian lajward, "blue stone".