warning triangle

noun

"warning-triangle" is a 15-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
16
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A triangle made of (usually) red reflective material, used to warn other road users of a broken-down vehicle.

Corpus desk

Index EN-warning-triangle · warning triangle · English

warning triangle · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 16 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "W" 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 warning triangle
PropertyValue
Headwordwarning triangle
LanguageEnglish
Part of speechNoun
Letters16
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “warning triangle” in English

warning trianglesits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

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

Rare enough to double-check

warning triangle is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A triangle made of (usually) red reflective material, used to warn other road users of a broken-down vehicle.".

We couldn't generate a plausible misspelling set for warning triangle, a straightforward case of a spelling with little room for common typos. Our dataset records no confusable match here, which tends to mean the word is visually distinctive enough to stand on its own.

Our source data has no etymology on file for this entry, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct English form is warning triangle, spelled W-A-R-N-I-N-G- -T-R-I-A-N-G-L-E.

Definition

  1. 1
    A triangle made of (usually) red reflective material, used to warn other road users of a broken-down vehicle.

Recorded use

Wiktionary example

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

  1. If your vehicle breaks down, [...] put a warning triangle on the road at least 45 metres (147 feet) behind your broken-down vehicle on the same side of the road.

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 "warning triangle"?
"warning triangle" is spelled W-A-R-N-I-N-G- -T-R-I-A-N-G-L-E.
What does "warning triangle" mean?
As a noun, "warning triangle" means: A triangle made of (usually) red reflective material, used to warn other road users of a broken-down vehicle.
What language does "warning triangle" come from?
"warning triangle" is a English word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
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