mo·lal·i·ty (mō-lāl'ĭ-tē) n.
pl.mo·lal·i·ties The molal concentration of a solute, usually expressed as the number of moles of solute per 1,000 grams of solvent.
molality mo·lal·i·ty (mō-lāl'ĭ-tē) n. The molal concentration of a solute, usually expressed as the number of moles of solute per 1,000 grams of solvent.