WordNet sense 1 (a classification of propositions on the basis of whether they claim necessity or possibility or impossibility):

modality

WordNet sense 2 (verb inflections that express how the action or state is conceived by the speaker):

mood

WordNet sense 3 (any of various fixed orders of the various diatonic notes within an octave):

musical mode

WordNet sense 4 (the most frequent value of a random variable):

modal value

WordNet sense 5 (how something is done or how it happens):

fashion, manner, way, style