Definition of: dynamics

(dī·nam′iks) noun plural
(construed as singular in defs. 1,2, and 4)
1. The branch of physics that treats of the motion of bodies and the effects of forces in producing motion, and of the laws of the motion thus produced (kinetics): opposed to statics.
2. The science that treats of the action of forces, whether producing equilibrium or motion; in this sense including both statics and kinetics.
3. The forces producing or governing activity or movement of any kind; also, the methods of such activity: spiritual dynamics.
4. Music a The words, symbols, etc., used to indicate degrees of loudness: also dynamic marks. b The act or technique of producing varying degrees of loudness.