[ 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), di·a·gramed or di·a·grammed, di·a·gram·ing or di·a·gram·ming.

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 formsdi·a·gram·ma·ble, adjectivemis·di·a·grammed, adjectiveun·di·a·gramed, adjectiveun·di·a·grammed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for diagramming

  • The task of diagramming a territory for invasion is one after Henry H. Rogers' own heart.

    Frenzied Finance|Thomas W. Lawson
  • In diagramming anything Flint could come to be certain that he had been a slow one.

British Dictionary definitions for diagramming


/ (ˈdaɪəˌɡræm) /


a sketch, outline, or plan demonstrating the form or workings of something
maths a pictorial representation of a quantity or of a relationshipa Venn diagram

verb -grams, -gramming or -grammed or US -grams, -graming or -gramed

to show in or as if in a diagram
Derived Formsdiagrammatic (ˌdaɪəɡrəˈmætɪk), adjectivediagrammatically, adverb

Word Origin for diagram

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

Word Origin and History for diagramming



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