adjective

1. relating to an object, or objects, in motion
2. energetic; vigorous; forceful
3. relating to or tending toward change or productive activity
4. Comput.
   1. designating or of an event that occurs during the execution of a program dynamic dump
   2. designating or of memory that requires periodic renewal of its stored data
5. Electronics designating or of a speaker, microphone, etc. in which a diaphragm or cone is attached to a coil that vibrates within a fixed magnetic field

Etymology: Fr dynamique < Gr dynamikos < dynamis, power, strength < dynasthai, to be able

noun