American English

Definition of inertia noun from the Oxford Advanced American Dictionary



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  1. 1(usually disapproving) lack of energy; lack of desire or ability to move or change I can't seem to get rid of this feeling of inertia. the forces of institutional inertia in the school system
  2. 2(physics) a property (= characteristic) of matter (= a substance) by which it stays still or, if moving, continues moving in a straight line unless it is acted on by a force outside itself
See the Oxford Advanced Learner's Dictionary entry: inertia

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