Illustrious, 1) excellent, glorious: LLL I, 1, 178. Troil. III, 3, 278. Tim. III, 2, 87. Lr. V, 3, 135.
2) without lustre, wanting brightness: “an eye base and i. as the smoky light that's fed with stinking tallow,” Cymb. I, 6, 109 (M. Edd. illustrous, inlustrous, unlustrous).