AO1 · Knowledge & Comprehension
IB Command Term: Define
What does "Define" mean in IB exams? Learn how to write precise definitions that earn full marks quickly.
IB Definition
"Give the precise meaning of a word, phrase, concept or physical quantity."
Marks: 1–2 marksAssessment Objective: Objective 1
01—The job
What You Need to Do
Write the exact meaning in one clear sentence. For 2+ marks, add a specific example.
How to Structure Your Answer
- 1State the precise meaning in one clear sentence
- 2Use subject-specific vocabulary where appropriate
- 3For 2-mark questions, add a specific example (e.g., "such as…")
02—In the paper
Example Exam Questions
- “Define the term "biodiversity".”
- “Define "sustainability".”
- “Define the term "market share".”
- “Define "opportunity cost".”
03—Avoid these
Common Mistakes
- Writing too much — definitions should be 1–2 sentences max
- Using the word itself in the definition (circular)
- Missing the example when the question is worth 2 marks
- Being vague instead of precise
Tip
Examiner Tip
Check the marks: 1 mark = definition only. 2 marks = definition + example.
04—By subject
Where This Term Appears
ESSHighBusiness ManagementHighEconomicsHigh
Now try a Define question.
Write the exact meaning in one clear sentence. For 2+ marks, add a specific example.