retardant

adjective re·tar·dant \ ri-ˈtär-dᵊnt \

Definition of retardant

: serving or tending to retard
  • a growth-retardant substance

retardant

noun

First Known Use of retardant

1642

in the meaning defined above

See Words from the same year
NEW! Time Traveler

RETARDANT Defined for English Language Learners

retardant

Definition of retardant for English Language Learners

  • : able to slow down the progress or development of something


Learn More about retardant


Seen and Heard

What made you want to look up retardant? 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 case containing an explosive

Get Word of the Day daily email!

Test Your Vocabulary

May 2018 Words of the Day Quiz

  • spring-flowers
  • Which is a synonym of raillery?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Citation

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!