means way.eccl. law. Where there is by custom a particular manner of tithing allowed, different from the general law of taking tithes in kind, as a pecuniary compensation, or the performance of labor, or when any means are adopted by which the general law of tithing is altered, and a new method of taking them is introduced, it is called a modus decimandi, or special manner of taking tithes.
Way of operating. A term often used in police work, abreviated "m.o.", refering to the particular way a certain criminal performs his criminal act.