ENGLISH
REFERENCE

fly under the radar

idiom
Meaning

To go unnoticed, especially for a long period of time.


Origin

disputed origin

From military contexts, where aircraft would fly low to avoid being detected by radar.

Examples
SIMPLE

He tries to fly under the radar at work.

CONTEXTUAL

The company kept its new project secret to fly under the radar until the official launch.

COMPLEX

By maintaining a modest lifestyle and avoiding public attention, the author managed to fly under the radar for decades while writing her best-selling novels.

Anchors to
Related idioms8entries
  1. 01

    drop off the radar

    To vanish or fall into obscurity; to become forgotten or ignored.

  2. 02

    fly blind

    To do by guesswork; to feel one's way.

  3. 03

    fly by

    To pass or go past quickly, often without much interaction

  4. 04

    fly by the seat of one's pants

    To pilot an aircraft without the aid of instruments and without a flight plan, using only instinct, visual observation, and practical judgment.

  5. 05

    fly in the face of

    To act in a manner highly contrary to; to counteract or contradict.

  6. 06

    fly in the ointment

    Something (especially a minor thing) which ruins or spoils everything else, or makes it less pleasant; a nuisance or problem; a disagreeable or unpleasant detail.

  7. 07

    fly low

    To have one's fly (zipper) undone.

  8. 08

    fly off

    To flee rapidly; to run away.

Last updated April 17, 2026