Pronunciation: (dī'u-gram"), [key]
—n., v., -gramed or -grammed, -gram•ing or -gram•ming.
1. a figure, usually consisting of a line drawing, made to accompany and illustrate a geometrical theorem, mathematical demonstration, etc.
2. a drawing or plan that outlines and explains the parts, operation, etc., of something: a diagram of an engine.
3. a chart, plan, or scheme.
to represent by a diagram; make a diagram of.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.