- the property of matter by which it retains its state of rest or its velocity along a straight line so long as it is not acted upon by an external force.
- an analogous property of a force: electric inertia.
OTHER WORDS FROM inertiain·er·tial, adjectivenon·i·ner·tial, adjective
How to use inertia in a sentence
Inertial mass is the amount of matter in an object, the measure of the resistance an object has when a force pushes it.The Equivalence Principle and Testing Einstein With Spaceships and Atoms|Matthew R. Francis|June 4, 2014|DAILY BEAST
They are the inertial power – rather than the counterfist of reform.After the Rain|Sam Vaknin
"You are, of course, aware of the problems inherent in the development of inertial systems," Marks began.The Electronic Mind Reader|John Blaine
The delicate accelerometers and inertial guidance components did all the piloting until the second stage kicked us loose.The Trouble with Telstar|John Berryman
British Dictionary definitions for inertia
- the tendency of a body to preserve its state of rest or uniform motion unless acted upon by an external force
- an analogous property of other physical quantities that resist changethermal inertia
Derived forms of inertiainertial, adjective
Scientific definitions for inertia
Cultural definitions for inertia
In physics, the tendency for objects at rest to remain at rest, and for objects in uniform motion to continue in motion in a straight line, unless acted on by an outside force. (See Newton's laws of motion.)