having a form that presents very little resistance to a flow of air or water

streamlined passenger trains

the fish has a sleek streamlined body

having been made simpler and more efficient or effective

this streamlined approach will significantly reduce the learning curve for new users

a more streamlined decision-making process

design or provide with a form that presents very little resistance to a flow of air or water, increasing speed and ease of movement

engineers can reduce a vehicle's fuel consumption by reducing its size and weight and by streamlining its body

make (an organization or system) more efficient and effective by employing faster or simpler working methods

the company streamlined its operations by removing whole layers of management