Maxim
Maxim , noun
[French maxime, Latin maxima (sc. sententia), the greatest sentence, proposition, or axiom, that is, of the greatest weight or authority, fem. from maximus greatest, superl. of magnus great. See Magnitude, and compare Maximum.]
1.
An established principle or proposition; a condensed proposition of important practical truth; an axiom of practical wisdom; an adage; a proverb; an aphorism.
'T is their maxim, Love is love's reward.
2.
(Music) The longest note formerly used, equal to two longs, or four breves; a large.