LOW definition: 1. near the ground, not high: 2. below the usual level: 3. deep or quiet: . Learn more. low (comparative lower, superlative lowest) Situated close to, or even below, the ground or another normal reference plane; not high or lofty. synonyms, antonym quotations Synonyms: nether, underslung Antonym: high Students enter a 2D pixel-art gameworld where they guide Low through levels filled with obstacles and puzzles. The game focuses on skillful navigation and reasoning with an emphasis on problem solving, persistence, and motor skills. Play Low 's Adventures 3 at Math Playground! Definition of low noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.