Noun

(en noun)

A plan, drawing, sketch or outline to show how something works, or show the relationships between the parts of a whole.

*{{quote-magazine, date=2012-03

, author= , title=Pixels or Perish , volume=100, issue=2, page=106 , magazine= citation , passage=Drawings and pictures are more than mere ornaments in scientific discourse. Blackboard sketches, geological maps, diagrams of molecular structure, astronomical photographs, MRI images, the many varieties of statistical charts and graphs: These pictorial devices are indispensable tools for presenting evidence, for explaining a theory, for telling a story.}}

Electrical diagrams show device interconnections.

A graph or chart.

(category theory) 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 ".

Noun

A particular method for performing a task.

* {{quote-magazine, date=2014-06-14, volume=411, issue=8891, magazine=(The Economist)

, title= It's a gas , passage=One of the hidden glories of Victorian engineering is proper drains. Isolating a city’s effluent and shipping it away in underground sewers has probably saved more lives than any medical procedure except vaccination.}}

A series of small tasks or steps taken to accomplish an end.

(label) The set of established forms or methods of an organized body for accomplishing a certain task or tasks.

The steps taken in an action or other legal proceeding.

* (Isaac Taylor) (1787–1865)

Gracious procedures .

(label) That which results; issue; product.

(Bacon)

(label) A subroutine or function coded to perform a specific task.

(label) A surgical operation.