1

underweight

play
noun un·der·weight \ ˌən-dər-ˈwāt \

Definition of underweight

:weight below normal, average, or requisite weight

Recent Examples of underweight from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'underweight.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of underweight

1596


2

underweight

adjective

Definition of underweight

:weighing less than the normal or requisite amount

Examples of underweight in a Sentence

  1. the long illness left him frail and underweight

Recent Examples of underweight from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'underweight.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of underweight

1675


UNDERWEIGHT Defined for English Language Learners

underweight

adjective

Definition of underweight for English Language Learners

  • : weighing less than the normal or expected amount : too light


UNDERWEIGHT Defined for Kids

underweight

play
adjective un·der·weight \ ˌən-dər-ˈwāt \

Definition of underweight for Students

:weighing less than what is normal, average, or necessary

Medical Dictionary

underweight

play
adjective un·der·weight \ -ˈwāt \

medical Definition of underweight

:weighing less than the normal amount for one's age, height, and build
  • underweight children
  • underweight adults typically have a body mass index of less than 18.5


Seen and Heard

What made you want to look up underweight? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

a strongly worded attack

Get Word of the Day daily email!

Test Your Vocabulary

Merriam-Webster's New Words Quiz—Fall 2017 Edition!

  • young-plant-shoots
  • Which of the following is a new sense of the word bunny?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!