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Webster 1913 Edition

Diagonal

Di-ag′o-nal

,
Adj.
[L.
diagonalis
, fr. Gr. [GREEK] from to angle;
διά
through + [GREEK] an angle; perh. akin to E.
knee
: cf. F.
diagonal
.]
(Geom.)
Joining two not adjacent angles of a quadrilateral or multilateral figure; running across from corner to corner; crossing at an angle with one of the sides.
Diagonal bond
(Masonry)
,
herringbone work. See
Herringbone
,
Adj.
–
Diagonal built
(Shipbuilding)
,
built by forming the outer skin of two layers of planking, making angles of about 45° with the keel, in opposite directions.
–
Diagonal cleavage
.
See under
Cleavage
.
–
Diagonal molding
(Arch.)
,
a chevron or zigzag molding.
–
Diagonal rib
.
(Arch.)
See
Cross-springer
.
–
Diagonal scale
,
a scale which consists of a set of parallel lines, with other lines crossing them obliquely, so that their intersections furnish smaller subdivisions of the unit of measure than could be conveniently marked on a plain scale.
–
Diagonal stratification
.
(Geol.)
Same as
Cross bedding
, under
Cross
,
Adj.

Di-ag′o-nal

,
Noun.
1.
A right line drawn from one angle to another not adjacent, of a figure of four or more sides, and dividing it into two parts.
2.
(Engin.)
A member, in a framed structure, running obliquely across a panel.
3.
A diagonal cloth; a kind of cloth having diagonal stripes, ridges, or welts made in the weaving.

Webster 1828 Edition

Diagonal

DIAGONAL

,
Adj.
[Gr. A corner.]
1.
In geometry, extending from one angle to another of a quadrilateral figure, and dividing it into two equal parts.
2.
Being in an angular direction.

DIAGONAL

,
Noun.
A right line drawn from angle to angle of a quadrilateral figure, as a square or parallelogram, and dividing it into two equal parts. It is sometimes called the diameter, and sometimes the diametral.

Definition 2024

Diagonal

Diagonal

See also: diagonal

English

Proper noun

Diagonal

  1. A city/town in Iowa.

diagonal

diagonal

See also: Diagonal

English

Adjective

diagonal ‎(not comparable)

  1. (geometry) Joining two nonadjacent vertices (of a polygon or polyhedron).
  2. Having slanted or oblique lines or markings.
  3. Having a slanted or oblique direction.
    • 2011 January 12, Saj Chowdhury, “Liverpool 2 - 1 Liverpool”, in BBC:
      The visitors' undoing was caused by a diagonal ball from the right which was nodded into the six-yard area by Ian Evatt and finished off by Campbell.
  4. Of or related to the cattycorner legs of a quadruped, whether the front left and back right or front right and back left.

Synonyms

Derived terms

Translations

Noun

diagonal ‎(plural diagonals)

  1. (geometry) A line joining non-adjacent vertices of a polygon.
  2. Anything forming or resembling such a line, particularly:
    1. (geometry) A line or plane at an oblique angle to another.
    2. (fashion) A line or cut across a fabric at an oblique angle to its sides.
    3. (typography, uncommon) Synonym of slash ⟨/⟩.
      • 1965, Dmitri A. Borgmann, Language on Vacation, page 240:
        Initial inquiries among professional typists uncover names like slant, slant line, slash, and slash mark. Examination of typing instruction manuals discloses additional names such as diagonal and diagonal mark, and other sources provide the designation oblique.

Synonyms

  • (oblique line or cut across a fabric): bias
  • (oblique punctuation mark): See slash

Antonyms

Derived terms

Translations

Catalan

Etymology

From Latin diagōnālis, from Ancient Greek διαγώνιος ‎(diagṓnios, “from angle to angle”).

Adjective

diagonal m, f ‎(masculine and feminine plural diagonals)

  1. diagonal

Derived terms

Noun

diagonal f ‎(plural diagonals)

  1. diagonal

Danish

Pronunciation

  • IPA(key): /diaɡonaːl/, [d̥iaɡ̊oˈnæːˀl]

Adjective

diagonal

  1. diagonal

Inflection

Inflection of diagonal
Positive Comparative Superlative
Common singular diagonal — —2
Neuter singular diagonalt — —2
Plural diagonale — —2
Definite attributive1 diagonale — —
1) When an adjective is applied predicatively to something definite, the corresponding "indefinite" form is used.
2) The "indefinite" superlatives may not be used attributively.

Noun

diagonal c (singular definite diagonalen, plural indefinite diagonaler)

  1. diagonal

Declension

References

Galician

Adjective

diagonal m, f (plural diagonais)

  1. diagonal

German

Etymology

From Latin diagōnālis, from Ancient Greek διαγώνιος ‎(diagṓnios, “from angle to angle”).

Pronunciation

  • Rhymes: -aːl

Adjective

diagonal ‎(not comparable)

  1. diagonal

Declension

Portuguese

Adjective

diagonal m, f ‎(plural diagonais, comparable)

  1. (geometry) diagonal (joining two nonadjacent vertices)
  2. diagonal (having a slanted or oblique direction)

Noun

diagonal f (plural diagonais)

  1. diagonal (something arranged diagonally or obliquely)
  2. (geometry) diagonal (diagonal line or plane)

Spanish

Etymology

From Latin diagōnālis, from Ancient Greek διαγώνιος ‎(diagṓnios, “from angle to angle”).

Adjective

diagonal m, f ‎(plural diagonales)

  1. diagonal

Derived terms

Noun

diagonal f ‎(plural diagonales)

  1. diagonal

Derived terms

Swedish

Etymology

From Latin diagōnālis, from Ancient Greek διαγώνιος ‎(diagṓnios, “from angle to angle”).

Adjective

diagonal (not comparable)

  1. diagonal

Declension

Inflection of diagonal
Indefinite/attributive Positive Comparative Superlative2
Common singular diagonal — —
Neuter singular diagonalt — —
Plural diagonala — —
Definite Positive Comparative Superlative
Masculine singular1 diagonale — —
All diagonala — —
1) Only used, optionally, to refer to things whose natural gender is masculine.
2) The indefinite superlative forms are only used in an attributive role.

Derived terms

Noun

diagonal c

  1. diagonal

Declension

Inflection of diagonal 
Singular Plural
Indefinite Definite Indefinite Definite
Nominative diagonal diagonalen diagonaler diagonalerna
Genitive diagonals diagonalens diagonalers diagonalernas

Derived terms

Etymology

From Middle French diagonal, from Latin diagōnālis, from Ancient Greek διαγώνιος ‎(diagṓnios, “from angle to angle”), from διά ‎(diá, “across”) + γωνία ‎(gōnía, “angle”).

Pronunciation

  • IPA(key): /daɪˈæɡənəl/, /daɪˈæɡnəl/

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