modal
noun
Definitions
A modal proposition.
A modal form, notably a modal auxiliary.
(grammar) A modal verb.
A modal window, one that cannot be closed until a decision is made.
adjective
Definitions
Of, or relating to a mode or modus
(grammar) of, relating to, or describing the mood of a clause
Of, relating to, or composed in the musical modi by which an octave is divided, associated with emotional moods in Ancient — and in medieval ecclesiastical music
Of, or relating to the modality between propositions