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English definition of “inertia”

inertia

noun [U] uk   /ɪˈnɜː.ʃə/ us    /-ˈnɝː-/

inertia noun [U] (LACK OF ACTIVITY)

lack of activity or interest, or unwillingness to make an effort to do anything: The organization is stifled by bureaucratic inertia.Laziness and lazy peopleAvoiding action

inertia noun [U] (FORCE)

specialized physics the physical force that keeps something in the same position or moving in the same directionEnergy, force and powerPower and intensity
(Definition of inertia from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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