The state of being expeditious; celerity, rapidity or speed(noun)
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Use "expeditiousness" in a sentence
"Maybe because a retreat to "expeditiousness" doesn't feel like an argument you'd support."
"He is to have full access to all of your findings, and you all are to consider his inquiries with the expeditiousness that you do mine."
"Here is one of the fronts in this new foreign policy, strengthened by Obama's pressure for expeditiousness (once a decision has been made) that is already transforming the implementation of policy."