| 1. | a technique of engraving upon a gem or other stone, as onyx, in such a way that an underlying stone of one color is exposed as a background for a low-relief design of another color. |
| 2. | a gem or other stone so engraved. |
| 3. | a literary sketch, small dramatic scene, or the like, that effectively presents or depicts its subject. |
| 4. | Also called cameo role. a minor part played by a prominent performer in a single scene of a motion picture or a television play. |

| CAMEO computer-aided management of emergency operations |