Read the dictionary entry. The adjective radiant in a dictionary entry, showing syllable breakdown and pronunciation guide. 1. Releasing heat 2. Made of radiation 3. Filled with light or very bright The noun radiant in a dictionary entry, showing syllable breakdown and pronunciation guide. 1. The origin of a meteoric shower Read the sentence. She looked at the nighttime sky and saw the silver moon's radiant glow. Which dictionary definition best describes how the word "radiant" is used in this sentence? releasing heat made of radiation filled with light or very bright the origin of a meteoric shower