quarto

UK: /ˈkwɔː^rtəʊ/ US: /ˈkwɔrtoʊ/ ,(kwôr′tō)

Inflections of 'quarto' (n): npl: quartos

WordReference Random House Learner's Dictionary of American English © 2025

quar•to /ˈkwɔrtoʊ/   n., pl. -tos, adj. 
n. [countable]

1. Printing a book size of about 9½ × 12 in. (24 × 30 cm), originally made by folding printed sheets twice to form four leaves or eight pages.
2. Printing a book of this size.

adj. [before a noun]

3. Printing bound in quarto.

WordReference Random House Unabridged Dictionary of American English © 2025

quar•to  (kwôr′tō), n., pl. -tos, adj. 
n. 

1. Printing a book size of about 9½ × 12 in. (24 × 30 cm), determined by folding printed sheets twice to form four leaves or eight pages. Symbol: 4to, 4°
2. Printing a book of this size.

adj. 

3. Printing bound in quarto.

• short for Neo-Latin in quartō in fourth (quartō, ablative singular of quartus fourth) 1580–90

Collins Concise English Dictionary © HarperCollins Publishers::

quarto / ˈkwɔːtəʊ/ noun ( -tos)

1. a book size resulting from folding a sheet of paper, usually crown or demy, into four leaves or eight pages, each one quarter the size of the sheet

Etymology: 16th Century: from New Latin phrase in quartō in quarter

WordReference Random House Learner's Dictionary of American English © 2025

for•mat /ˈfɔrmæt/   n., v., -mat•ted, -mat•ting. 
n. [countable]

1. the organization, plan, or style of something, such as the general appearance of a book, magazine, or newspaper.
2. Computing the arrangement of data for computer input or output.

v. [~ + object]

3. to plan or provide a format for.
4. Computing
   • to set the format of:
     to format a computer document.
   • to prepare (a computer disk) for writing and reading.

See -form-.

WordReference Random House Unabridged Dictionary of American English © 2025

for•mat  (fôr′mat), n., v., -mat•ted, -mat•ting. 
n. 

1. the shape and size of a book as determined by the number of times the original sheet has been folded to form the leaves. Cf. duodecimo, folio (def. 2), octavo, quarto. 
2. the general physical appearance of a book, magazine, or newspaper, such as the typeface, binding, quality of paper, margins, etc.
3. the organization, plan, style, or type of something:
   The format of the show allowed for topical and controversial gags.
4. Computing the arrangement of data for computer input or output, such as the number and size of fields in a record or the spacing and punctuation of information in a report.

v.t. 

5. Radio and Television to plan or provide a format for:
   to format the annual telethon.
6. Computing
   • to set the format of (input or output):
     Some word-processing programs format output in a variety of ways.
   • to prepare (a disk) for writing and reading.

v.i. 

7. to devise a format.

• Latin (liber) fōrmātus (a book) formed (in a certain way)
• French
• 1830–40

for′mat•ter, n.