Zeal | Automated payroll Log into your account Email address Automate onboarding, payroll, taxes, and billing for... STREAMLINED definition: having a contour designed to offer the least possible resistance to a current of air, water, etc.; optimally shaped for motion or conductivity. See examples of streamlined used in a … c. Effectively organized or simplified: a streamlined method of production. Having flowing, graceful lines; sleek: a streamlined convertible. Improved in appearance or efficiency; modernized. 3 days ago · The meaning of STREAMLINED is contoured to reduce resistance to motion through a fluid (such as air). How to use streamlined in a sentence. streamline something (business) to make changes to a business or system, in order to make it more efficient, especially by spending less money The production process is to be streamlined. The word 'streamlined' originated in the 1920s in the context of aerodynamics, referring to a smooth shape that offers little resistance in motion.