molar UK /məʊlə(ɹ)/US /ˈmoʊlɚ/adjective 3noun 2forms 1 adjective3 •Of or relating to the molar teeth, or to grinding. •Of, relating to, or being a solution containing one mole of solute per litre of solution. •Of or relating to a complete body of matter as distinct from its molecular or atomic constituents. noun2 •A back tooth having a broad surface used for grinding one's food.Jamie had a molar removed as it was decaying. •A unit of concentration equal to one mole per litre. formsmolars