Breadcrumb Home > Thesaurus > L Synonyms of lightless Find synonyms for: Adjective 1. lightless, invisible (vs. visible), unseeable usage: giving no light; "lightless stars `visible' only to radio antennae" 2. lightless, unilluminated, unlighted, unlit, dark (vs. light) usage: without illumination; "came up the lightless stairs"; "the unilluminated side of Mars"; "through dark unlighted (or unlit) streets" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of lightless (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: hagiography Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language