What does inertia mean?

Definitions for inertia
ɪnˈɜr ʃə, ɪˈnɜr-in·er·ti·a

This dictionary definitions page includes all the possible meanings, example usage and translations of the word inertia.

Princeton's WordNet

  1. inactiveness, inactivity, inertianoun

    a disposition to remain inactive or inert

    "he had to overcome his inertia and get back to work"

  2. inertianoun

    (physics) the tendency of a body to maintain its state of rest or uniform motion unless acted upon by an external force


  1. Inertianoun

    (Physics) That property of matter by which it tends when at rest to remain so, and when in motion to continue in motion, and in the same straight line or direction, unless acted on by some external force; -- sometimes called vis inerti


  1. inertianoun

    The property of a body that resists any change to its uniform motion; equivalent to its mass.

  2. inertianoun

    In a person, unwillingness to take action.


  1. inertia

    Inertia is a fundamental physical concept that refers to an object's resistance to change in its state of motion. This means, an object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction, until acted upon by an external force. It is directly proportional to the mass of the object, meaning heavier objects have more inertia than lighter ones. The principle of inertia is graphically described in Newton's first law of motion.

Webster Dictionary

  1. Inertianoun

    that property of matter by which it tends when at rest to remain so, and when in motion to continue in motion, and in the same straight line or direction, unless acted on by some external force; -- sometimes called vis inertiae

  2. Inertianoun

    inertness; indisposition to motion, exertion, or action; want of energy; sluggishness

  3. Inertianoun

    want of activity; sluggishness; -- said especially of the uterus, when, in labor, its contractions have nearly or wholly ceased

  4. Etymology: [L., idleness, fr. iners idle. See Inert.]


  1. Inertia

    Inertia is the resistance of any physical object to a change in its state of motion or rest, or the tendency of an object to resist any change in its motion. The principle of inertia is one of the fundamental principles of classical physics which are used to describe the motion of matter and how it is affected by applied forces. Inertia comes from the Latin word, iners, meaning idle, or lazy. Isaac Newton defined inertia as his first law in his Philosophiæ Naturalis Principia Mathematica, which states: In common usage the term "inertia" may refer to an object's "amount of resistance to change in velocity", or sometimes to its momentum, depending on the context. The term "inertia" is more properly understood as shorthand for "the principle of inertia" as described by Newton in his First Law of Motion; that an object not subject to any net external force moves at a constant velocity. Thus an object will continue moving at its current velocity until some force causes its speed or direction to change. On the surface of the Earth inertia is often masked by the effects of friction and air resistance, both of which tend to decrease the speed of moving objects, and gravity. This misled classical theorists such as Aristotle, who believed that objects would move only as long as force was applied to them.

The Nuttall Encyclopedia

  1. Inertia

    that property of bodies by which they remain in a state of rest or of motion in a straight line till disturbed by a force moving them in the one case or arresting them in the other.

The Standard Electrical Dictionary

  1. Inertia

    A force in virtue of which every body persists in its state of motion or rest except so far as it is acted on by some force.

Dictionary of Nautical Terms

  1. inertia

    The passive principle by which bodies persist in a state of motion or rest, and resist as much as they are resisted. (See VIS INERTIÆ.)

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  1. inertia

    Song lyrics by inertia -- Explore a large variety of song lyrics performed by inertia on the Lyrics.com website.

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  1. Chaldean Numerology

    The numerical value of inertia in Chaldean Numerology is: 1

  2. Pythagorean Numerology

    The numerical value of inertia in Pythagorean Numerology is: 4

Examples of inertia in a Sentence

  1. W. Clement Stone:

    That's why many fail -- because they don't get started -- they don't go. They don't overcome inertia. They don't begin.

  2. Sir Winston Churchill, March 1936, demanding British re-armament:

    Virtuous motives, trammeled by inertia and timidity, are no match for armed and resolute wickedness. A sincere love of peace is no excuse for muddling hundreds of millions of humble folk into total war. The cheers of the weak, well-meaning assemblies soon cease to count. Doom marches on.

  3. John Kenneth Galbraith:

    Total physical and mental inertia are highly agreeable, much more so than we allow ourselves to imagine. A beach not only permits such inertia but enforces it, thus neatly eliminating all problems of guilt. It is now the only place in our overly active world that does.

  4. William James:

    Human beings are born into this little span of life of which the best thing is its friendship and intimacies, and soon their places will know them no more, and yet they leave their friendships and intimacies with no cultivation, to grow as they will by the roadside, expecting them to "keep" by force of inertia.

  5. Murat Toprak:

    Even if we put aside the Fed, we still have this political uncertainty and we are seeing an inertia in monetary policy, historically ... we have seen the central bank be a bit more active when the currency falls, but despite the record lows for the Turkish lira, the reaction of the central bank has been extremely limited.

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"inertia." Definitions.net. STANDS4 LLC, 2024. Web. 16 Jul 2024. <https://www.definitions.net/definition/inertia>.

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    marked by sudden changes in subject and sharp transitions
    A profound
    B abrupt
    C tight
    D urban

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