- past tense form of streamline.
- past participle of streamline.
streamlined
Americanadjective
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having a contour designed to offer the least possible resistance to a current of air, water, etc.; optimally shaped for motion or conductivity.
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designed or organized to give maximum efficiency; compact.
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modernized; up-to-date.
adjective
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offering or designed to offer the minimum resistance to the flow of a gas or liquid
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made more efficient, esp by simplifying
Other Word Forms
Etymology
Origin of streamlined
First recorded in 1890–95; streamline + -ed 2
Explanation
Something that works better because it's been made more efficient or modern is streamlined. Your streamlined system for printing flyers advertising your yard sale means you can print them much faster than before. There are two ways to use the adjective streamlined. First, there's the simplified, more efficient system, like a streamlined healthcare system or a streamlined driver's license process. The second meaning is "sleek" or "aerodynamic." The streamlined shape of a bullet train means it can travel much faster than older, rectangular train cars. The original meaning of streamline, from the 1850s, was "line drawn from point to point, so that its direction is everywhere that of the motion of the fluid." A streamlined aircraft or watercraft has smooth, flowing curves, contoured to offer the least resistance to the flow of air or water.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Mathias J. Weber and Russell E. Vanderhoff’s seductively streamlined Health-o-Meter scale gave the illusion that homeowners could be scientists, for the first time monitoring their own weight and growth.
From Los Angeles Times ● Oct. 7, 2026
This streamlined process allows estates like your mother’s to be settled more quickly and at a fraction of the cost of traditional probate.
From MarketWatch ● Sep. 27, 2026
They wanted a more sophisticated package-tracking system and streamlined returns process.
From The Wall Street Journal ● Sep. 18, 2026
Some of the latest aircraft feature cockpit windows that are also curved, to make the plane more streamlined, which improves fuel efficiency.
From BBC ● Sep. 15, 2026
Richard looked up and saw them, two planes flying low, with an ominously streamlined efficiency to their shape, trailing silver-white lines in the sky.
From "Half of a Yellow Sun" by Chimamanda Ngozi Adichie
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
