dynamic

Changing; active; in motion.

"The environment is dynamic, changing with the years and the seasons."

Powerful; energetic.

"He was a dynamic and engaging speaker."

Able to change and adapt.

Having to do with the volume of sound.

"The dynamic marking in bar 40 is forte."

Happening at runtime instead of being predetermined at compile time.

"dynamic allocation"

Pertaining to dynamics, the branch of mechanics concerned with the effects of forces on the motion of objects.

Of a verb: not stative, but fientive; indicating continued or progressive action on the part of the subject.

A characteristic or manner of an interaction; a behavior.

"Watch the dynamic between the husband and wife when they disagree."

A moving force.

"The study of fluid dynamics quantifies turbulent and laminar flows."

The varying loudness or volume of a song or the markings that indicate the loudness.

"If you pay attention to the dynamics as you play, it's a very moving piece."

A symbol in a musical score that indicates the desired level of volume.

A verb that indicates continued or progressive action on the part of the subject.