All 4 Uses

dynamic
in
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But the lines rearranged themselves before I could work out the dynamic, and the principal said: "Willow, do you know why you're here?"
p. 36.5 *

dynamic = interaction of forces influencing a system
Because as I watched the school district offices recede into the distance, I was certain that the old dynamic between Dell and Mai and me was over.
p. 107.5

dynamic = the interaction of the forces influencing a system
I've tried to be invisible, but just my presence here has changed the dynamic of the situation.
p. 186.3

dynamic = interaction of forces influencing a system
The Misfits had no power dynamic.†
p. 44.4

Definitions:

(1) (dynamic as in: a dynamic personality)
energetic or powerful -- often inspiring others
(2) (dynamic as in: a dynamic system)
continually changing -- typically in a good or adaptive way
(3) (dynamics as in: the system dynamic)
the interaction of all the forces influencing a system
(4) (meaning too rare to warrant focus)