IGCSE key definitions

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Updated IGCSE Vocabulary Resources

IGCSE Key Definitions

What are key definitions and why do we need to know them?

What are key definitions and why do we need to know them?

  1. Key definitions are the important definitions.
  2. Every subject has its own vocabulary. And it becomes important to know the correct vocabulary in order to score full marks or to get the best grades as per individual potential.
  3. Correct vocabulary develops confidence in answering questions.
  4. It is important to know the meaning of the scientific vocabulary. For example, it is important to know the difference between momentum and moment of a force.
  5. Just as knowing the meaning of all key terms is important, it is also important to have a complete list of all the definitions in one place, and that too topic wise. This way you can immediately look up for the word that you want without wasting time .
  6. Finally, what is more important is that the definitions, that you study should be relevant to the syllabus. Remember that there are millions of word for each subject, but it is important to know only those words that are relevant to the syllabus for the particular academic year
  7. Our website gives you the key words keeping in mind the above points.Also suitable changes are made to the content as per the syllabus updates. So we dot serve you out-dated content. Our ultimate aim is to create passionate learners for every subject . It is a known fact that every one cannot major in every subject. But at the same time it is important for educators like us to ensure that every subject being learnt should be a source of joy and not stress.
  • All IGCSE key definitions /laws/concepts/formulae for various IGCSE Subjects in one place.
  • Designed keeping in mind the IGCSE syllabus and mark schemes, all content works perfectly like an IGCSE Dictionary for Physics/Chemistry/Mathematics/Biology/Economics/Business Studies/Global Perspective/English
  • Helping you to quickly memorise the key points, this works like a perfect last minute revision guide.

Browse Key Definitions by Subject

IGCSE Economics Key Definitions [0455/0987(9-1)]

For 2026/2027/2028 Exams + Later Years

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IGCSE Extended Math Glossary [0580/0980(9-1)]

For 2026/2027/2028 Exams + Later Years

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IGCSE Additional Glossary [0606]

For 2026/2027/2028 Exams + Later Years

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IGCSE International Mathematics Glossary [0607]

For 2026/2027/2028 Exams + Later Years

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IGCSE Combined Science Glossary [0653]

For 2026/2027/2028 Exams + Later Years

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IGCSE Coordinated Sciences Glossary [0654]

For 2026/2027/2028 Exams + Later Years

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