Definition of: ultramarine

(ul′trə·mə·rēn′) noun
1. A deep, usually purplish-blue, permanent pigment made by treating the powdered mineral lapis lazuli.
2. A similar pigment made largely by synthesis from kaolin, silica, soda, sulfur, and charcoal: also called new blue, French blue.
3. The color of ultramarine.
—adjective Being beyond or across the sea. [<Med. L ultramarinus <L ultra beyond + marinus marine]