mo·​dus | \ ˈmōdəs\
plural modi\ -​ˌdī \see sense 2

Definition of modus

1 : the immediate manner in which property may be acquired (as by occupation or prescription) or the particular tenure by which it is held
2 plural moduses : a customary mode of tithing by composition instead of by payment in kind still took his tithe pig or his modus— George Eliot
3 : a mode of procedure : a way of doing something no modus of accomplishing this desired result— Ezra Pound
4 : mode
5 or mode plural modes : the relationship between the long and the breve in mensural music In minor modus there are two breves to the long, whereas in major modus there are three. — compare prolation, tempus

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History and Etymology for modus

Latin, measure, manner

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a servile follower or underling

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