/duy nam"iks/ , n.
1. ( used with a sing. v. ) Physics. the branch of mechanics that deals with the motion and equilibrium of systems under the action of forces, usually from outside the system.
2. ( used with a pl. v. ) the motivating or driving forces, physical or moral, in any field.
3. ( used with a pl. v. ) the pattern or history of growth, change, and development in any field.
4. ( used with a pl. v. ) variation and gradation in the volume of musical sound.
5. ( used with a sing. v. ) psychodynamics.
[ 1780-90; see DYNAMIC, -ICS ]