Emily Dickinson Lexicon

LU'MIN-OUS, a. [L. luminosus; Fr. lumineux.]

1. Shining; emitting light. The sun is a most luminous body.
2. Light; illuminated. The moon is rendered luminous by the rays of the sun.
3. Bright; shining; as, a luminous color.
4. Clear; as, a luminous essay or argument.