Definition of rapidness in US English:

rapidness

noun

  • See rapid

    • ‘The following section describes those experiments showing the dramatic effect of rapidness of flow rate changes on the dynamics of this system.’
    • ‘He said that the government had prioritized the sale of ‘technology driven’ companies because of the rapidness of change in technology.’
    • ‘As I listened to the steady in-and-out of my own breathing, and the increasing rapidness of my heartbeat, I wished, for a moment in time, that Kerwin would kiss me.’
    • ‘When we look at your paintings, the latest ones at least, there's a sense of rapidness, of spontaneity.’
    • ‘I consider the gameplay speed of Halo 2 to be just perfect for online playing compared to the vertigo-inducing rapidness of Doom 3.’

Pronunciation

rapidness

/ˈrapədnəs//ˈræpədnəs/