Definition of diagram in English:

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Pronunciation: /ˈdīəˌɡram/


(abbreviation diag.)
1A simplified drawing showing the appearance, structure, or workings of something; a schematic representation: a diagram of the living room
More example sentences
  • They are packed with detail but it doesn't seem overwhelming because the pages are broken up with masses of superb colour photographs, maps, street-by-street diagrams and drawings.
  • Apart from the run-of-the-mill stuff like e-mail and word processing, he is teaching himself to use the computer to draw schematic diagrams.
  • The data are summarized in the schematic diagram below.
drawing, line drawing, sketch, representation, draft, illustration, picture, plan, outline, delineation, figure;
Computing  graphic
1.1 Geometry A figure composed of lines that is used to illustrate a definition or statement or to aid in the proof of a proposition.
Example sentences
  • Along with many line diagrams and equations, the problems and ‘mathematical meanderings’ strengthen concepts in each chapter.
  • Stefan handed some chalk to Spencer who began drawing various diagrams on the board.

verb (diagrams, diagraming, diagramed; also diagramming, diagrammed)

[with object]
Represent (something) in graphic form: the experiment is diagramed on page fourteen
More example sentences
  • The screening method is diagrammed in Fig 1A and represents a modification of the crossing design of COYNE et al. 1998.
  • The Kensico Cemetery burial card diagrams the wedge-shaped plot, 5 feet by 8 by 40.
  • By diagramming actual people in actual relationships, we are introducing both mechanical and conceptual problems.


Early 17th century: from Latin diagramma, from Greek, from diagraphein 'mark out by lines', from dia 'through' + graphein 'write'.

  • graft from Late Middle English:

    A graft is a shoot from one plant fixed into a slit made in another to form a new growth. Originally spelled graff, it derives from Greek graphion ‘stylus, pointed writing implement’, from graphein ‘to write’, source of the graphite (late 18th century) in your pencil, graphic art (mid 17th century), and diagram (early 17th century). The tapered tip of the shoot was thought to resemble a stylus. The other graft (mid 19th century), ‘hard work’, may be related to the phrase spade's graft ‘the amount of earth that one stroke of a spade will move’, based on Old Norse groftr ‘digging’.

For editors and proofreaders

Syllabification: di·a·gram

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