1

undercover

play
adjective un·der·cov·er \ˌən-dər-ˈkə-vər\

Definition of undercover

  1. :  acting or executed in secret; specifically :  employed or engaged in spying or secret investigation an undercover agent

undercover

adverb

Examples of undercover in a sentence

  1. an undercover operation to infiltrate the terrorist organization

  2. for months she's been an undercover agent pretending to be a drug dealer

1920

First Known Use of undercover

1920


2

undercover

noun un·der·cov·er

Definition of undercover

  1. :  a person engaged in undercover activity :  spy

Examples of undercover in a sentence

  1. within the city was a well-organized fifth column, and these undercovers would make themselves known as soon as the invading forces breached the city limits

1962

First Known Use of undercover

1962


UNDERCOVER Defined for English Language Learners

1

undercover

play
adjective un·der·cov·er \ˌən-dər-ˈkə-vər\

Definition of undercover for English Language Learners

  • : done or working in a secret way in order to catch criminals or collect information



Seen and Heard

What made you want to look up undercover? 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

capable of being altered or controlled

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • peter-bruegel-tower-of-babel-painting
  • What language does pajama come from?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

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!