Merriam-Webster Collegiate Dictionary - mode

 I. noun  Etymology: Middle English moede, from Latin modus measure, manner, musical ~ — more at mete  Date: 14th century  1.  a. an arrangement of the eight diatonic notes or tones of an octave according to one of several fixed schemes of their intervals  b. a rhythmical scheme (as in 13th and 14th century music)  2. mood II,2  3. Late Latin modus, from Latin  a. mood II,1  b. the modal form of the assertion or denial of a logical proposition  4.  a. a particular form or variety of something flying and other ~s of transport  b. a form or manner of expression ; style  5. a possible, customary, or preferred way of doing something explained in the usual solemn ~  6.  a. a manifestation, form, or arrangement of being; specifically a particular form or manifestation of an underlying substance  b. a particular functioning arrangement or condition ; status a spacecraft in reentry ~ a computer operating in parallel ~  7.  a. the most frequent value of a set of data  b. a value of a random variable for which a function of probabilities defined on it achieves a relative maximum  8. any of various stationary vibration patterns of which an elastic body or oscillatory system is capable the vibration ~ of an airplane propeller blade the vibrational ~s of a molecule  Synonyms: see method  II. noun  Etymology: French, from Latin modus  Date: circa 1645 a prevailing fashion or style (as of dress or behavior)  Synonyms: see fashion