It focuses special attention on a term. If the writer finds the formal sentence definition, more effective than the informal definition, the technique of formal definition must be employed.
Formal Sentences Definition
It has three parts: term, genus, and differentia
a. Term – the concept defined
b. Genus – the family to which the term belong
c. Differentia – the specific characteristics of the species which sets it apart from all
others of it class
EXAMPLE :
TERM GENUS DIFFERENTIA
A triangle a plane figure bounded by three straight lines having three angles
Extended Formal Definition
A one-sentence definition sometimes is not in defining a complex or highly specialized term. A reader might be dissatisfied with this explanation, especially if it occurred in a report particularly concerned with the subject . He might very well ask what the term is not, where it is located, what its function is, what its effects are.
Take the term “ozone” as an example.
A formal sentence goes like this:
“A bluish gaseous reactive form of oxygen that is formed naturally in the atmosphere and is used for disinfecting, deodorizing, and bleaching”.
POINTERS TEXT
What ozone is -which some people wrongly think is the refreshing
air at the Seaside,is a poisonous type of oxygen .At
ground level, it makes up less than one part per
million of the air. However,
Location of Ozone -a thin layer of ozone about 24 kms, above ground level the
stratosphere, blocks outmost of the sun’s burning
Function of ozone - ultraviolet rays
Effect of ozone destroyed - If these rays reached the ground, they would kill all
land animals and plants. That is why, this poisonous
gas shield is important. There is considerable concern
over reports of the possible destruction of this ozone
layer by the pollutants.
There are different ways by which we can expand a formal definition. Some of these ways are as follows:
1. giving the uses or the functions of a term
Example:
One of the organs we cannot live without is the liver, which is the largest organ in our body. It enables the body to function efficiently by filtering toxic substances from the blood. It is responsible for producing proteins, bile, and immune agents, without which, our body will not be able to combat infection and disease.
2. giving the origin of the term
Example:
The word placebo comes from a Latin word which means pleasing or acceptable. It refers to the desire of a person who seeks the help of the doctor to be healed.
3. giving its causes and or effects, advantages or disadvantages
Example:
Vitamin C, also known as ascorbic acid, can cause headaches and intestinal and rinary problems when taken in excess doses. It can also increase iron absorption, a condition which can have adverse effects on people with certain blood disorders.
4. illustrating or describing its appearance
Example:
An organ is a large complex musical wind instrument with pipes, stops, and a keyboard.
5. explaining what is not
Example:
A good breakfast cannot be equated with just a cup of coffee and a cookie. Neither that it just consist of one serving of fruit and a glass of water. Nor should it be a bowl of rice and coffee.
6. analyzing its parts
Example:
The process of writing consists of four stages: getting ideas, getting started, writing drafts, and revising.
( Raimes, 1983) The first require the writer to brainstorm with peers and other persons to generate topics to write on. The second requires him or her to start locating sources and taking down notes. The third is the writing stage itself. The last requires the writer to polish the initially produced manuscript.
7. classifying it
Example:
Theobromen belongs to a class of alka loid molecules known as methylxanthine found in cocoa beans.
8. stating where it is from
Example:
Stress is a term which was introduced in 1956 in the American vernacular.
9. giving its collocations
Example:
Stress has always been associated with changes, worries, pressures, and problems.
10. giving examples
Example:
Examples of lyric poems are sonnet, song, ode, simple lyric, and the elegy.
2. INFORMAL DEFINITION
According to Mills and Walter, it does not require the application of an unchanging, rigid formula; rather, it is a “technique” that can be used only when the writer is certain that the term alone and not the referent which is unfamiliar to the reader. It consists of one or more synonymous expressions substituted for the unfamiliar term used.
Examples:
TERM INFORMAL DEFINITION
Broadcast report (synonym)
Broadcast the transmission of sounds or images
(synonymous phrase )
Here are some guides when you are writing using the Definition Technique:
1.Try to use simple terms. Do not define an unfamiliar term by using more difficult terminology which would rather confuse the reader.
2.If the term being defined is a noun, the word after should also be a noun. Do not begin you definition with when, what or where.
3.In defining a term, avoid using the term itself or any of its derivative.
4.Do not put the term you ae defining into two broad or too narrow a class.