quadrilateral

/ˌkwɒdɹɪˈlætəɹəl/

//ˌkwɒdɹɪˈlætəɹəl// noun

By · According to Wiktionary data (CC BY-SA) ·

"quadrilateral" is a 13-letter English headword indexed on PlainSpell.

The verdict

“quadrilateral” is uncommon English (frequency #61,741 among 288 “Q” headwords), classed as a noun. The kind of spelling people second-guess.

#61,741
frequency rank, English
288
“Q” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A polygon with four sides.

Corpus desk

Index EN-quadrilateral · quadrilateral · English

quadrilateral · rank #61,741 · 0 variants · 0 confusables

  • FREQ-RARE #61,741
  • LEN-MEGA 13 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 288
  • PHOTO-FINISH quadriceps

Nearest frequency peer: quadriceps (-1 rank slots)

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.

Long-tail ranks near “quadrilateral”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “quadrilateral” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for quadrilateral
PropertyValue
Headwordquadrilateral
LanguageEnglish
Part of speechNoun
IPA/ˌkwɒdɹɪˈlætəɹəl/
Letters13
Frequency rank#61,741
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “quadrilateral” in English

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).quadrilateralfalls in this rarity band:

#1#100#1K#10K#100K
← used constantlyrarely used →

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Rare peers in the same band: “quadriceps” (#61,740), “quartile” (#61,742), “pyrotechnic” (#61,738). Among 288 “Q” headwords, “quadrilateral” is #61,741. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

quadrilateral is uncommon English at frequency #61,741 among 288 “Q” headwords, classed as anoun, transcribed /ˌkwɒdɹɪˈlætəɹəl/. Rarity is why readers land here mid-draft. 2 senses are on record.

No generated misspelling entries exist for quadrilateral in our index, a sign its spelling follows regular English conventions. No confusable counterpart is on file for this word, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: Learned borrowing from Latin quadrilaterus + -al. The correct English form is quadrilateral, spelled Q-U-A-D-R-I-L-A-T-E-R-A-L.

Definition

  1. 1
    A polygon with four sides.
  2. 2
    An area defended by four fortresses supporting each other.

Recorded use

Wiktionary example

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

  1. The Venetian quadrilateral comprised Mantua, Peschiera, Verona, and Legnano.

Etymology

Learned borrowing from Latin quadrilaterus + -al.

Synonyms

4-gontetragonquadrilateralquadrangletetract

This word in other languages

cuadrilátero(Español)quadrilatère(Français)Viereck(Deutsch)quadrilátero(Português)

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "quadrilateral"?
"quadrilateral" is spelled Q-U-A-D-R-I-L-A-T-E-R-A-L. The IPA pronunciation is /ˌkwɒdɹɪˈlætəɹəl/.
What does "quadrilateral" mean?
As a noun, "quadrilateral" means: A polygon with four sides.
How do you pronounce "quadrilateral"?
The IPA (International Phonetic Alphabet) transcription for "quadrilateral" is /ˌkwɒdɹɪˈlætəɹəl/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "quadrilateral"?
Learned borrowing from Latin quadrilaterus + -al. 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "quadrilateral", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 13 letters (nearest by frequency rank).

nonconformist#61,666neuroblastoma#61,665maxillofacial#61,623transmissible#61,873

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

Source: FrequencyWords open word-frequency list