quarto

noun

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

"quarto" is a 6-letter English headword indexed on PlainSpell.

The verdict

“quarto” is an uncommon English word, ranked #53,191 in English word frequency and used as a noun.

#53,191
frequency rank, English
6
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A size of paper (7.5"-10" x 10"-12.5" or 190-254 x 254-312 mm). Formed by folding and cutting one of several standard sizes of paper (15"-20" x 20"-25" or 381-508 x 508-635 mm) twice to form 4 leav...

Key facts for quarto
PropertyValue
Headwordquarto
LanguageEnglish
Part of speechNoun
Letters6
Frequency rank#53,191
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “quarto” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). quarto lands here:

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

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for quarto is 6 letters long, classified as a noun. Corpus data places it at rank #53,191 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 3 distinct senses for this headword, so context determines which meaning a reader should apply.

Our edit-distance generator produced no likely misspellings for quarto, a sign its spelling follows regular English conventions. This headword has no recorded confusable partner, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: From Latin quartus (“fourth”). The correct English form is quarto, spelled Q-U-A-R-T-O.

Definition

  1. 1
    A size of paper (7.5"-10" x 10"-12.5" or 190-254 x 254-312 mm). Formed by folding and cutting one of several standard sizes of paper (15"-20" x 20"-25" or 381-508 x 508-635 mm) twice to form 4 leaves (eight sides).
  2. 2
    A size of paper (7.5"-10" x 10"-12.5" or 190-254 x 254-312 mm). Formed by folding and cutting one of several standard sizes of paper (15"-20" x 20"-25" or 381-508 x 508-635 mm) twice to form 4 leaves (eight sides).
  3. 3
    A book size, corresponding to the paper size.

Etymology

From Latin quartus (“fourth”).

Synonyms

4to4ºQ

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 "quarto"?
"quarto" is spelled Q-U-A-R-T-O.
What does "quarto" mean?
As a noun, "quarto" means: A size of paper (7.5"-10" x 10"-12.5" or 190-254 x 254-312 mm). Formed by folding and cutting one of several standard sizes of paper (15"-20" x 20"-25" or 381-508 x 508-635 mm) twice to form 4 leav...
What is the origin of the word "quarto"?
From Latin quartus (“fourth”). 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.

Using “quarto”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is Q-U-A-R-T-O - every other letter order is a misspelling in standard orthography.
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list