adjective (1)
in·​fes·​tive | \ə̇nˈfestiv\

Definition of infestive 

(Entry 1 of 2)

: likely to infest : troublesome infestive weeds


adjective (2)
in·​festive | \(ˈ)in+\

Definition of infestive (Entry 2 of 2)

: not festive : mirthless

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for infestive

Adjective (1)

infest + -ive

Adjective (2)

in- entry 1 + Latin festivus festive

Keep scrolling for more

Learn More about infestive

Statistics for infestive

Look-up Popularity

More from Merriam-Webster on infestive

Britannica English: Translation of infestive for Arabic Speakers

Comments on infestive

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


something that serves to warn or remind

Get Word of the Day daily email!

Test Your Vocabulary

Autumn Words of the Day 2018

  • a-top-down-image-of-road-through-an-autumn-forest
  • Which is a synonym of fugacious?
True or False

Test your knowledge - and maybe learn something along the way.

Word Winder's CrossWinder

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


Love words? Need even more definitions?

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