adjective Also, dynamical.
pertaining to or characterized by energy or effective action; vigorously active or forceful; energetic: the dynamic president of the firm.
of or pertaining to force or power.
of or pertaining to force related to motion.
pertaining to the science of dynamics.
of or pertaining to the range of volume of musical sound.
Computers. (of data storage, processing, or programming) affected by the passage of time or the presence or absence of power: Dynamic memory must be constantly refreshed to avoid losing data. Dynamic websites contain Web pages that are generated in real time.
Grammar, nonstative.
a basic or dynamic force, especially one that motivates, affects development or stability, etc.

1810–20; < French dynamique < Greek dynamikós, equivalent to dýnam(is) force, power + -ikos -ic

dynamically, adverb
nondynamic, adjective
nondynamical, adjective
nondynamically, adverb
undynamic, adjective
undynamically, adverb
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
dynamic (daɪˈnæmɪk)
1.  of or concerned with energy or forces that produce motion, as opposed to static
2.  of or concerned with dynamics
3.  Also: dynamical characterized by force of personality, ambition, energy, new ideas, etc
4.  music of, relating to, or indicating dynamics: dynamic marks
5.  computing Compare static (of a memory) needing its contents refreshed periodically
[C19: from French dynamique, from Greek dunamikos powerful, from dunamis power, from dunasthai to be able]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1817, as a term in philosophy; 1827 in the sense "force producing motion," from Fr. dynamique (1762), from Ger. dynamisch, introduced by Leibnitz 1691 from Gk. dynamikos "powerful," from dynamis "power," from dynasthai "be able to have power," of unknown origin. The figurative sense of "active, potent,
energetic" is from 1856. Related: Dynamically.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
dynamic   (dī-nām'ĭk)  Pronunciation Key 
  1. Relating to energy or to objects in motion. Compare static.

  2. Relating to the study of dynamics.

  3. Characterized by continuous change or activity.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The maps are too big and the action too dynamic.
Ecosystems, powered by solar energy, are dynamic and ever-changing.
Because minus human emissions, the earth is in a state of dynamic equilibrium
  as it has been for millions of years.
Escalation is a game mode that is very dynamic and strategic.
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