light·weight

[lahyt-weyt]
adjective
1.
2.
being lighter in weight, texture, etc., than another item or object of identical use, quality, or function: a lightweight topcoat; a lightweight alloy for ship construction.
3.
without seriousness of purpose; trivial or trifling: lightweight reading.
4.
of or pertaining to a lightweight: He's the new lightweight contender.
5.
(of a horse, especially a hunter) able to carry up to 165 pounds (75 kg).
noun
6.
a person of less than average weight.
7.
Informal. a person who is of little influence, importance, or effect.
8.
a boxer or other contestant intermediate in weight between a featherweight and a welterweight, especially a professional boxer weighing between 126 and 135 pounds (56.7–61 kg).
00:10
Lightweight is always a great word to know.
So is gobo. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a fool or simpleton; ninny.

Origin:
1765–75; light2 + weight

ul·tra·light·weight, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
lightweight (ˈlaɪtˌweɪt) [Click for IPA pronunciation guide]
 
adj
1.  of a relatively light weight
2.  not serious; trivial
 
n
3.  a person or animal of a relatively light weight
4.  a.  a professional boxer weighing 130--135 pounds (59--61 kg)
 b.  an amateur boxer weighing 57--60 kg (126--132 pounds)
 c.  (as modifier): the lightweight contender
5.  a wrestler in a similar weight category (usually 115--126 pounds (52--57 kg))
6.  informal a person of little importance or influence

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

lightweight
1773 in pugilism and horse-racing; from light (adj.) + weight. Figurative sense of "inconsequential" first attested 1809.
Online Etymology Dictionary, © 2010 Douglas Harper
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Slang Dictionary

lightweight definition


  1. mod.
    inconsequential. : This is a fairly lightweight matter.
  2. n.
    an inconsequential person; someone who accomplishes very little. : Don't worry about her. She's just a lightweight.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw Hill.
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Example sentences
Supporting technologies include lightweight, superstrong materials and advanced
  engines, among other things.
But in particle physics terms-and especially when it comes to the nuclear
  physics of antimatter-helium is no lightweight.
Instead of bricks, lightweight moulded concrete blocks are used for the walls.
Proposed solutions include lightweight fuel cells and batteries molded to the
  shape of a soldier's body armor.
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