1. [ noun ] a disposition to remain inactive or inert
Synonyms: inactivity inactiveness

"he had to overcome his inertia and get back to work"

Related terms: activeness trait passivity indolence restfulness languor
2. [ noun ] (physics) the tendency of a body to maintain is state of rest or uniform motion unless acted upon by an external force
Related terms: mechanical_phenomenon moment_of_inertia physics
Similar spelling:   inertial