Definition of: diagram

(dī′ə·gram) noun
1. A line drawing, mechanical plan, or outline, as distinguished from a perspective drawing.
2. A rough projection, map, chart, etc.
3. A figure drawn to aid in demonstrating a geometrical proposition or to illustrate geometrical relations.
4. An outline figure intended to represent any object or area, or to show the relation between parts or places, or to illustrate the value or relations of quantities, forces, etc.
5. A graph.
—v.t. ·gramed or ·grammed, ·gram·ing or ·gram·ming
1. To represent by diagram.
2. To illustrate by a diagram. [<Gk. diagramma <dia- across + graphein write]
—di·a·gram·mat·ic (dī′ə·grə·mat′ik) or ·i·cal adjective
—di′a·gram·mat′i·cal·ly adverb