Primary English tuition for Wellington Primary School families should help students define a word or concept precisely instead of circling around it with examples. eduKateSG is not affiliated with, endorsed by, or part of Wellington Primary School; this is an independent tuition resource for families.
This rebuilt legacy URL now owns one distinct teaching job: definition writing—category → distinguishing feature → example → boundary. The old school-teacher wording, stale contact details and generic 2017 claims have been removed.
eduKateSG currently teaches selected Primary English students in focused 3-pax small groups, typically 1.5 hours, at 83 Punggol Central, Singapore 828761 and 8 Fourth Avenue, Singapore 268674.
The Direct Answer
A strong definition usually answers:
- Category: what kind of thing is it?
- Distinguishing feature: what makes it this thing rather than a nearby thing?
- Example: what clear case illustrates it?
- Boundary: what similar case should not be included?
A definition should let the reader decide what belongs inside the category and what does not.
Why Examples Are Not Definitions
Question: “What is a habitat?” Weak answer: “A forest is a habitat.”
The example is correct but does not define the category.
Stronger: “A habitat is the natural place or environment in which an organism lives.” The forest can then be used as an example.
Start With a Useful Category
“A simile is a comparison…” is more informative than “A simile is something in English…”
The category places the concept near related ideas before the distinguishing feature separates it.
Add the Distinguishing Feature
“A simile is a comparison that explicitly uses words such as like or as to compare one thing with another.”
The feature separates simile from comparison more generally and from metaphor.
Use an Example to Test the Definition
Example: “The lake was like glass.” The phrase compares the smooth/still appearance of the lake with glass using like.
The example shows how the definition operates.
Use a Non-Example to Find the Boundary
“The lake was glass” is metaphorical rather than a simile because the comparison is expressed directly without like or as.
Non-examples expose whether the definition is precise enough.
Worked Example: “Reliable”
Category: an adjective describing trustworthiness or consistency.
Distinguishing feature: something or someone can be depended on to perform or behave as expected.
Example: “The bus service is reliable because it usually arrives at the scheduled time.”
Boundary: something that succeeds once by luck is not automatically reliable.
Worked Example: “Evidence”
Category: information used to support or test a claim.
Distinguishing feature: it has a relevant relationship to whether the claim should be believed.
Example: a quoted action from a story can support a character-trait inference.
Boundary: a personal opinion unrelated to the claim is not evidence for that claim.
Definitions Can Be Too Broad
“A vehicle is something that moves.” This includes people, animals and clouds.
The definition needs distinguishing features about transport and design/use.
Definitions Can Be Too Narrow
“A vehicle is a car used to carry people.” This excludes buses, bicycles and other legitimate members.
Students test definitions against several examples, not only the first familiar one.
Circular Definitions
“A helpful person is someone who is helpful” does not add meaning.
Better: “A helpful person willingly provides useful assistance when another person needs it.”
Definition Writing Supports Vocabulary
Instead of memorising one dictionary line, students can explain the category, feature and boundary in their own words, then test the word in several contexts.
This creates deeper semantic knowledge and helps prevent near-synonym confusion.
Definition Writing Supports Comprehension
When a passage uses an unfamiliar term and then gives examples/non-examples, students can reconstruct the category from context.
Definition structure therefore works in both reading and writing.
The Counterexample Test
Ask: can I find something that fits my words but clearly should not belong?
If yes, the definition is too broad. Refine the distinguishing feature.
The Multiple-Example Test
Test the definition against at least three different valid examples. If it only fits the first familiar case, it may be too narrow.
P1–P2: Simple Categories
Young learners can define familiar objects using category and one distinguishing feature: “A triangle is a shape with three sides.”
P3–P4: Examples and Non-Examples
Middle-primary students can test vocabulary and school concepts against varied examples to strengthen category boundaries.
P5–P6: Abstract Definitions and Qualification
Upper-primary students can define abstract terms such as responsibility, evidence, fairness or reliability while avoiding circular and overbroad wording. The MOE Primary English syllabus emphasises vocabulary depth and effective explanation across contexts. Official reference: MOE English Language Syllabus 2020 Primary.
Common Definition Failure Modes
| Symptom | Issue | Repair |
|---|---|---|
| Gives example only | Category missing | State what kind of thing it is |
| Definition includes everything | Too broad | Add distinguishing feature |
| Only one familiar case fits | Too narrow | Test multiple examples |
| Uses word to define itself | Circular | Explain underlying feature |
| Near-synonyms blur | Boundary weak | Add non-example/contrast |
Why Three Students Helps
One student proposes a definition, another gives a new example and the third tries to find a counterexample. The group revises until the category boundary survives all three tests.
When Wellington Primary School Families May Consider This Support
- The child explains words mainly with examples.
- Vocabulary definitions are vague or circular.
- Near-synonyms are hard to distinguish.
- Abstract terms are memorised but not understood deeply.
- Explanatory writing needs clearer conceptual precision.
What Progress Should Look Like
A stronger learner can place a concept in the correct category, identify the feature that distinguishes it, illustrate it and state where the category stops.
Independent tuition notice: eduKateSG is not affiliated with Wellington Primary School. Current eduKateSG centres: 83 Punggol Central, Singapore 828761 and 8 Fourth Avenue, Singapore 268674. Contact +65 8823 1234.