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A portable computer that is smaller than a notebook computer.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˈsʌbˌnoʊt bʊk)
a laptop computer smaller and lighter than a notebook, typically weighing less than 5 pounds (2.3 kg).
[1990–95, Amer.]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
ASUS is working on improving the experience for mobile creatives and professionals with the new ZenBook Pro Duo an ultraportable laptop featuring ScreenPad Plus, the next generation of the world's first intelligent touchpad.
ASUS ZenBook Pro Duo (UX581) is a new ultraportable laptop featuring the new ASUS ScreenPad(tm) Plus, a revolutionary full-width secondary touchscreen that expands and enhances the interactive capabilities offered by the original ScreenPad.
The ZenBook S (UX391) is a premium 13.3-inch ultraportable laptop that not only delivers effortless portability, powerful performance and no-compromise connectivity for discerning on-the-go users, but is also tested to meet military-grade MIL-STD-810G durability standards.
Samsung Electronics America Inc, a provider of digital media and digital convergence technologies, on Sunday unveiled its new ultraportable laptop, the ATIV Book 9.
The design of Acer's premium Windows 8 ultraportable laptop - the Aspire S7-191- is stunning.
Sony appears to have a slim, ultraportable laptop in the works.
1 Dell Latitude E5420 This ]4-inch ultraportable laptop with an Intel Core i5 processor and a 320 GB hard drive will make it a cinch to work remotely.
Looking for an ultraportable laptop or a projector?
Meanwhile, we're expecting a new ultraportable laptop from Apple, TV for your PS3, even cleverer sat-nav devices - and much more.
For anyone looking for an ultraportable laptop, the HP Envy is a very good option.
It registered 90 decibels when submitted on an audio test which is higher than the average ultraportable laptop that registers 84dB.