Definition of: emerald

(em′ər·əld, em′rəld) noun
1. A bright–green variety of beryl, which when clear and nearly flawless is one of the most highly valued gems.
2. In the Bible, an unidentified precious stone.
3. A rich and vivid green.
4. One of various green moths.
5. Printing A size of type intermediate between minion and nonpareil.
—Oriental emerald A valuable transparent variety of corundum.
—adjective
1. Pertaining to or like the emerald.
2. Of a rich green color. [<OF emeraude, esmeraldus <L smaragdus. Doublet of SMARAGD.]