follow Dictionary.com

Why is the ninth month called September?

underweight

[adj. uhn-der-weyt; n. uhn-der-weyt] /adj. ˈʌn dərˈweɪt; n. ˈʌn dərˌweɪt/
adjective
1.
weighing less than is usual, required, or proper.
noun
2.
deficiency in weight below a standard or requirement.
Origin
1590-1600
1590-1600; under- + weight
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for under weight

underweight

/ˌʌndəˈweɪt/
adjective
1.
weighing less than is average, expected, or healthy
2.
(finance)
  1. having a lower proportion of one's investments in a particular sector of the market than the size of that sector relative to the total market would suggest
  2. (of a fund etc) disproportionately invested in this way pension funds have become underweight of equities
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for under weight

underweight

adj.

1899, from under- + weight.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
under weight in Medicine

underweight un·der·weight (ŭn'dər-wāt')
adj.
Weighing less than is normal, healthy, or required. n.
Insufficiency of weight.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

Word of the Day

Difficulty index for underweight

Few English speakers likely know this word

Word Value for under

6
8
Scrabble Words With Friends