foolproof

play
adjective fool·proof \ˈfül-ˌprüf\

Definition of foolproof

  1. :  so simple, plain, or reliable as to leave no opportunity for error, misuse, or failure <a foolproof plan>

Examples of foolproof in a sentence

  1. DNA fingerprinting gives police a virtually foolproof way to link a suspect to a crime scene.

1902

First Known Use of foolproof

1902


FOOLPROOF Defined for English Language Learners

foolproof

play
adjective fool·proof \ˈfül-ˌprüf\

Definition of foolproof for English Language Learners

  • : done, made, or planned so well that nothing can go wrong


FOOLPROOF Defined for Kids

foolproof

play
adjective fool·proof \ˈfül-ˈprüf\

Definition of foolproof for Students

  1. :  done, made, or planned so well that nothing can go wrong <a foolproof recipe>



Seen and Heard

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

WORD OF THE DAY

gray or white with or as if with age

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • snowflake-closeup
  • Which is a synonym of imprecate?
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