- a geometric figure, used to illustrate a mathematical statement, proof, etc.
- a sketch, drawing, or plan that explains a thing by outlining its parts and their relationships, workings, etc.
- a chart or graph explaining or illustrating ideas, statistics, etc.
Origin of diagramClassical Greek diagramma from diagraphein, to mark out by lines, draw from dia- (see dia-) + graphein, to write (see graphic)
transitive verb-·gramed· or -·grammed·, -·gram·ing or -·gram·ming