Definition of escape velocity in US English:

escape velocity

noun

  • The lowest velocity which a body must have in order to escape the gravitational attraction of a particular planet or other object.

    • ‘What would happen if the escape velocity of a planet were greater than the speed of light?’
    • ‘If the object slows down below a minimum orbital velocity, it will hit the planet; if it speeds up beyond a maximum escape velocity, it will move away from the planet permanently.’
    • ‘The underlying concept is simple: the launcher accelerates the capsule to escape velocity.’
    • ‘Both NASA and the Russian Space Agency were still playing around with chemical rockets, trying to beat the seventeen-thousand mile an hour escape velocity.’
    • ‘The work presented in these two papers formed the basis for a later study of black holes, showing that bodies of sufficiently large mass would have an escape velocity exceeding the speed of light and so could not be seen.’

Pronunciation

escape velocity

/əˈskāp vəˌläsədē/