molar3Pronunciation: /ˈməʊlə/Translate molar | into French | into German | into Italian | into Spanish Definition of molar adjective Chemistry relating to one mole of a substance. (of a solution) containing one mole of solute per litre of solution. Derivatives molarityPronunciation: /məˈlarɪti/ noun molar in other Oxford dictionaries Definition of molar in the US English dictionary