[ 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


di·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. 2020

Examples from the Web for diagram

British Dictionary definitions for diagram

/ (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 forms of diagram

diagrammatic (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