under the radar

prep_phrase

"under-the-radar" is a 13-letter English headword indexed on PlainSpell.

The verdict

“under the radar” is uncommon English (outside the top frequency list), classed as a prep_phrase. The kind of spelling people second-guess.

Unranked
below top-frequency English
15
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Without attracting notice; in an undetected or secretive manner.

Corpus desk

Index EN-under-the-radar · under the radar · English

under the radar · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 15 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "U" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for under the radar
PropertyValue
Headwordunder the radar
LanguageEnglish
Part of speechPrep_phrase
Letters15
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “under the radar” in English

under the radarfalls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

under the radar is uncommon English outside the top frequency list, classed as aprep_phrase. Rarity is why readers land here mid-draft. Gloss: "Without attracting notice; in an undetected or secretive manner.".

No generated misspelling entries exist for under the radar in our index, since its letter pattern doesn't lend itself to common typo substitutions. No close-neighbour confusable shows up for this headword in our dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: An allusion to flying an airplane at an altitude too low for radar detection. The correct English form is under the radar, spelled U-N-D-E-R- -T-H-E- -R-A-D-A-R.

Definition

  1. 1
    Without attracting notice; in an undetected or secretive manner.

Recorded use

Wiktionary examples

These source excerpts show how under the radar appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Institutional change has not happened. But it's done quietly under the radar at lots of places.
  2. Look, we keep our hand in with Maitland as well as this Partick thing. But we do it under the radar.

Etymology

An allusion to flying an airplane at an altitude too low for radar detection.

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "under the radar"?
"under the radar" is spelled U-N-D-E-R- -T-H-E- -R-A-D-A-R.
What does "under the radar" mean?
As a prep_phrase, "under the radar" means: Without attracting notice; in an undetected or secretive manner.
What is the origin of the word "under the radar"?
An allusion to flying an airplane at an altitude too low for radar detection. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list