underactive

play
adjective un·der·ac·tive \-ˈak-tiv\

Definition of underactive

  1. :  characterized by an abnormally low level of activity <an underactive thyroid gland>

underactivity

play \-ˈti-və-tē\ noun

1959

First Known Use of underactive

1959


UNDERACTIVE Defined for English Language Learners

underactive

play
adjective un·der·ac·tive \-ˈak-tiv\

Definition of underactive for English Language Learners

  • : not active enough


Medical Dictionary

underactive

play
adjective un·der·ac·tive \-ˈak-tiv\

Medical Definition of underactive

  1. :  characterized by an abnormally low level of activity <an underactive thyroid gland>

underactivity

\-ak-ˈtiv-ət-ē\play noun plural

underactivities


Seen and Heard

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

WORD OF THE DAY

to search out and expose misconduct

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • alphabet-magnets
  • Which is the correct spelling?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ