1610s, from Old French modalité or directly from Medieval Latin modalitatem (nominative modalitas) "a being modal," from modalis (see modal). Related: Modalities.
modality mo·dal·i·ty (mō-dāl'ĭ-tē)n.
A therapeutic method or agent, such as surgery, chemotherapy, or electrotherapy, that involves the physical treatment of a disorder.
Any of the various types of sensation, such as vision or hearing.