Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

diabolical

play
adjective di·a·bol·i·cal \ˌdī-ə-ˈbä-li-kəl\

Simple Definition of diabolical

  • : extremely evil

  • : very unpleasant, bad, or annoying

Full Definition of diabolical

  1. :  of, relating to, or characteristic of the devil :  devilish <a diabolical plot>

di·a·bol·i·cal·ly play \-li-k(ə-)lē\ adverb
di·a·bol·i·cal·ness play \-li-kəl-nəs\ noun

Examples of diabolical

  1. <the police quickly mobilized to track down the diabolical serial killer>



Variants of diabolical

or di·a·bol·ic play \-ˈbä-lik\

Origin of diabolical

Middle English deabolik, from Middle French diabolique, from Late Latin diabolicus, from diabolus


First Known Use: 14th century


DIABOLICAL Defined for Kids

diabolical

play
adjective di·a·bol·i·cal \ˌdī-ə-ˈbä-li-kəl\

Definition of diabolical

  1. :  devilish 1



Variants of diabolical

or di·a·bol·ic \-ˈbä-lik\

Learn More about diabolical


Seen and Heard

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

WORD OF THE DAY

February 10, 2016

to put in good humor

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

duvet kittly-benders spindrift pince-nez
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ