modal

/M OW1 D AH0 L/
noun
  1. 1

    A modal proposition.

  2. 2

    A modal form, notably a modal auxiliary.

  3. 3

    (grammar) A modal verb.

  4. 4

    A modal window, one that cannot be closed until a decision is made.

adjective
  1. 1

    Of, or relating to a mode or modus

  2. 2

    (grammar) of, relating to, or describing the mood of a clause

  3. 3

    Of, relating to, or composed in the musical modi by which an octave is divided, associated with emotional moods in Ancient โ€” and in medieval ecclesiastical music

  4. 4

    Of, or relating to the modality between propositions

  5. 5

    Relating to the statistical mode.

  6. 6

    Having separate modes in which user input has different effects.

  7. 7

    Requiring immediate user interaction and thus presented so that it cannot be closed or interacted behind until a decision is made.

    โ€œa modal dialog; a modal windowโ€

  8. 8

    Relating to the form of a thing rather to any of its attributes

Source: https://en.wiktionary.org/wiki/modal