- to discover or catch (a person) in the performance of some act: to detect someone cheating.
- to discover the existence of: to detect the odor of gas.
- to find out the true character or activity of: to detect a spy.
- to rectify alternating signal currents in a radio receiver.
- to demodulate.
Origin of detect
1400–50; late Middle English < Latin dētēctus (past participle of dētegere), equivalent to dē- de- + teg(ere) to cover + -tus past participle suffix
2. See learn.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for undetected
Then, after carefully replacing the knob, it could be left there undetected.The High Society Bank Robber of the 1800s
J. North Conway
October 19, 2014
Powerful German units seeking to keep the escape route open were coming up, undetected, behind them.The Deadly Trap Behind D-Day’s Beaches
June 5, 2014
For example, reusable sponges can be worn comfortably and undetected during sex.The Next Big Environmental Fight: Tampons?
May 2, 2014
One of the drones, found in South Korea on March 24th, had apparently flown over Seoul undetected.Smoke Rings, Mystery Backpacks and Gun-Toting Robots: The Weird Wartech of the Korean Conflict
April 3, 2014
I think it's unlikely that we've had an undetected epidemic of seven-footers.Rethinking Thin
January 10, 2013
Jack and myself got in, after putting our heads together, and stole off undetected.Ned Myers
James Fenimore Cooper
What shall he profit, if his injustice be undetected and unpunished?The Republic
Now was her chance to slip down-stairs and, undetected, away.Nobody
Louis Joseph Vance
Moreover it was legitimate that I should have been undetected in the summer-house.The O'Ruddy
As it was, he glided back through the many rooms, undetected.Bloom of Cactus
Robert Ames Bennet
- not perceived, noticed, or discoveredthe fake bomb passed undetected
- to perceive or noticeto detect a note of sarcasm
- to discover the existence or presence of (esp something likely to elude observation)to detect alcohol in the blood
- to extract information from (an electromagnetic wave)
- obsolete to reveal or expose (a crime, criminal, etc)
C15: from Latin dētectus uncovered, from dētegere to uncover, from de- + tegere to cover
Word Origin and History for undetected
Online Etymology Dictionary, © 2010 Douglas Harper