monad: Meaning and Definition of

mon•ad

1. any simple, single-celled organism.
2. any of various small, flagellate, colorless ameboids with one to three flagella, esp. of the genus Monas.
2. an element, atom, or group having a valence of one. Cf.(def. 3),(def. 2a).
1. (in the metaphysics of Leibniz) an unextended, indivisible, and indestructible entity that is the basic or ultimate constituent of the universe and a microcosm of it.
2. (in the philosophy of Giordano Bruno) a basic and irreducible metaphysical unit that is spatially and psychically individuated.
3. any basic metaphysical entity, esp. having an autonomous life.
4. a single unit or entity.