plural of Illuminatus

The act of illuminating, or supplying with light; the state of being illuminated. / Festive decoration of houses or buildings with lights.

of, capable of, or causing illumination

Providing illumination or light. / (figuratively) Providing clarification or explanation; educational, revealing.

present participle of illuminate.

In an illuminating manner.

plural of illumination

In an illuminative manner.

Illuminism

coal gas, especially when used for domestic lighting