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n. Physics The tendency of a body to resist acceleration; the tendency of a body at rest to remain at rest or of a body in straight line motion to stay in motion in a straight line unless acted on by an outside force.

n. Resistance or disinclination to motion, action, or change: the inertia of an entrenched bureaucracy.

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

n. In a person, unwillingness to take action.

n. 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 inertiæ. The inertia of a body is proportional to its mass.

n. Inertness; indisposition to motion, exertion, or action; lack of energy; sluggishness.

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

n. Lack of activity; sluggishness; passiveness; inertness.

n. In physics, that property of matter by virtue of which it retains its state of rest or of uniform rectilinear motion so long as no foreign cause changes that state. Also called vis inertiæ (force of inertia).

n. In medicine, want of activity; sluggishness: a term especially applied to the condition of the uterus when it does not contract properly in parturition.

n. With regard to a plane or point, the sum of the elements of mass each multiplied by the square of its distance from the given plane or point.

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

n. a disposition to remain inactive or inert

"Instead, he had to give some ground, admit that he's not going to meet this August deadline he's been demanding to combat what he calls inertia back in Washington."

the principal axes of inertia    reduced inertia    electromagnetic inertia    principal screw of inertia    electric inertia    inverse ellipsoid of inertia    moment of inertia    product of inertia    magnetic inertia    ellipsoid of inertia   

vis inertiæ   

inertness    sluggishness    idleness    slothfulness    laziness    sloth   

laziness    apathy    inactivity    momentum    lethargy    incapacity    stupidity    inertness    idleness    carelessness