9 Grammatical Pitfalls


[dahy-uh-gram] /ˈdaɪ əˌgræm/
a figure, usually consisting of a line drawing, made to accompany and illustrate a geometrical theorem, mathematical demonstration, etc.
a drawing or plan that outlines and explains the parts, operation, etc., of something:
a diagram of an engine.
a chart, plan, or scheme.
verb (used with object), diagramed or diagrammed, diagraming or diagramming.
to represent by a diagram; make a diagram of.
Origin of diagram
1610-20; < Latin diagramma < Greek: that which is marked out by lines. See dia-, -gram1
Related forms
diagrammable, adjective
misdiagrammed, adjective
undiagramed, adjective
undiagrammed, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for diagram
  • No photograph, diagram or drawing had surfaced that showed what was to happen.
  • Plan an escape route and diagram the house, marking the two best ways to leave each section and get outside.
  • Graduation ceremonies vary quite substantially around the world but they tend to have this same underlying diagram.
  • People in different locations can chat to each other as they look at the same diagram on their screens.
  • Have students look at this diagram of a right whale, either online or on paper.
  • For years, the human brain has been compared to a computer-but it is a computer without a wiring diagram.
  • It is the kind of thing that is easy to diagram but difficult to explain.
  • As you click on pages, the small diagram at top traces your path through the story.
  • We are happy to share the table and the diagram with interested readers.
  • The air is then pumped out and water pressure pushes the pile into the ooze, as shown in the second diagram.
British Dictionary definitions for diagram


a sketch, outline, or plan demonstrating the form or workings of something
(maths) a pictorial representation of a quantity or of a relationship: a Venn diagram
verb -grams, -gramming, -grammed (US) -grams, -graming, -gramed
to show in or as if in a diagram
Derived Forms
diagrammatic (ˌdaɪəɡrəˈmætɪk) adjective
diagrammatically, adverb
Word Origin
C17: from Latin diagramma, from Greek, from diagraphein, from graphein to write
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for diagram

1610s, from French diagramme, from Latin diagramma, from Greek diagramma "geometric figure, that which is marked out by lines," from diagraphein "mark out by lines, delineate," from dia- "across, out" (see dia-) + graphein "write, mark, draw" (see -graphy). The verb is 1840, from the noun.

Online Etymology Dictionary, © 2010 Douglas Harper
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