A diagram is a symbolic representation of information according to visualization technique. Diagrams have been used since ancient times, but became more prevalent during the Enlightenment. Sometimes, the technique uses a three-dimensional visualization which is then projected onto a two-dimensional surface. The word graph is sometimes used as a synonym for diagram.
archaic form of diagram
A plan, drawing, sketch or outline to show how something works, or show the relationships between the parts of a whole.
“Electrical diagrams show device interconnections.”
A graph or chart.
A functor from an index category to another category. The objects and morphisms of the index category need not have any internal substance, but rather merely outline the connective structure of at least some part of the diagram’s codomain. If the index category is J and the codomain is C, then the diagram is said to be “of type J in C”.
To represent or indicate something using a diagram.
a simplified drawing showing the appearance, structure, or workings of something; a schematic representation
“a diagram of the living room”
a figure composed of lines that is used to illustrate a definition or statement or to aid in the proof of a proposition.
a graphical schedule for operating railway locomotives and rolling stock in order to provide a desired service.
represent (something) in graphic form
“the experiment is diagrammed on page fourteen”
schedule the operations of (a locomotive or train) according to a diagram.