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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.

inertia noun [U] (FORCE)

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