1. Technical Definitions
Chapter 20
Technical Definitions
Technical Communication, 11th Edition
John M. Lannon

2. Purpose of Technical Definitions
Answers the questions of what exactly are we talking about and what exactly is it
Addresses legal implications
Addresses ethical implications
Contains societal implications
Give a general but informative definition

3. Levels of Detail in a Definition
Parenthetical definition
Clarifies the meaning of a word by using a more familiar synonym
Sentence definition
Fixed Pattern: name of item; class to which the item belongs; the features that differentiate the item from all others in its class
Expanded definition
Extends to a short paragraph or even several pages depending on the complexity of the item

4. Directions in Which Definition Can Be Expanded
Can you explain what it doesn’t mean?
What is its origin and background?
How does it work?
How is it used?
Term or item to be defined
What are its parts?
What does it look like?
Does it require any special conditions?
Can it be compared with anything familiar?

5. Expansion Methods Etymology History and background Negation
Operating principle
Analysis of parts
Visuals
Comparison and contrast
Required materials or conditions
Example

6. Situations Requiring Definitions
Each time an audience encounters an unfamiliar term or concept
Placement of Definitions
Definitions should not interrupt the flow
More than 3-4 definitions on one page or screen will be disruptive
Rewrite them as sentence definitions and move them to a definitions section or glossary

7. Guidelines for Clear and Precise Definition
Decide on the level of detail.
Classify the item precisely.
Differentiate the item accurately.
Avoid circular definitions.
Expand your definition selectively.

8. Guidelines for Clear and Precise Definition
Use visuals to clarify your meaning.
Know “how much is enough.”
Consider the legal implications.
Consider the ethical implications.
Place your definition in an appropriate location.

9. Any Questions?
For additional help reviewing this chapter, please visit the Companion Website for your text at