Main Difference
The main difference between Diagram and Drawing is that the Diagram is a plan, drawing, sketch or outline to show how something works or the relationships between the parts of a whole and Drawing is a visual artwork in two-dimensional medium.
Diagram
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.
Drawing
Drawing is a form of visual art in which a person uses various drawing instruments to mark paper or another two-dimensional medium. Instruments include graphite pencils, pen and ink, various kinds of paints, inked brushes, wax colored pencils, crayons, charcoal, chalk, pastels, various kinds of erasers, markers, styluses, and various metals (such as silverpoint). “Digital drawing” is the act of using a computer to draw. Common methods of digital drawing include a stylus or finger on a touchscreen device, stylus-to-touchpad, finger-to-touchpad, or in some cases, a mouse. There are many digital art programs and devices.
A drawing instrument releases a small amount of material onto a surface, leaving a visible mark. The most common support for drawing is paper, although other materials, such as cardboard, plastic, leather, canvas, and board, may be used. Temporary drawings may be made on a blackboard or whiteboard or indeed almost anything. The medium has been a popular and fundamental means of public expression throughout human history. It is one of the simplest and most efficient means of communicating visual ideas. The wide availability of drawing instruments makes drawing one of the most common artistic activities.
In addition to its more artistic forms, drawing is frequently used in commercial illustration, animation, architecture, engineering and technical drawing. A quick, freehand drawing, usually not intended as a finished work, is sometimes called a sketch. An artist who practices or works in technical drawing may be called a drafter, draftsman or a draughtsman.
Diagram (noun)
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.”
Diagram (noun)
A graph or chart.
Diagram (noun)
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”.
Diagram (verb)
To represent or indicate something using a diagram.
Drawing (verb)
present participle of draw
Drawing (noun)
A picture, likeness, diagram or representation, usually drawn on paper.
Drawing (noun)
The act of producing such a picture.
Drawing (noun)
Such acts practiced as a graphic art form.
Drawing (noun)
The process of drawing or pulling something.
“Proverb: An official is great in his office as a well is rich in drawings of water.”
Drawing (noun)
An act or event in which the outcome (e.g., designating a winner) is selected by chance in the form of a blind draw, notably of lots; especially such a contest in which a winning name or number is selected randomly by removing (or drawing) it from a container, popularly a hat).
Drawing (noun)
A small portion of tea for steeping.
Diagram (noun)
a simplified drawing showing the appearance, structure, or workings of something; a schematic representation
“a diagram of the living room”
Diagram (noun)
a figure composed of lines that is used to illustrate a definition or statement or to aid in the proof of a proposition.
Diagram (noun)
a graphical schedule for operating railway locomotives and rolling stock in order to provide a desired service.
Diagram (verb)
represent (something) in graphic form
“the experiment is diagrammed on page fourteen”
Diagram (verb)
schedule the operations of (a locomotive or train) according to a diagram.