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Immune system

UK //ɪˈmjuːn ˈsɪstəm// US //ɪˈmjun ˈsɪstəm// Pronunciation

Definition

The body's defense system that protects against infections and diseases.

Listen to definition

In simple words: The body's system that fights off illness and diseases.

Examples

• A strong immune system is essential for good health.
• Vaccines help train the immune system to fight specific diseases.
• Nutrition plays a vital role in keeping your immune system functioning well.
• Stress can negatively impact the immune system and your overall health.
• Herbs like echinacea are believed to boost the immune system.

Usage notes

Use 'immune system' in medical or health-related discussions. It's not as common in casual conversation unless health is the topic.

Grammar pattern

standalone phrase

Memory hint

Think of 'immune' as 'I’m immune to illnesses', protecting yourself.

Collocations

• boost the immune system
• weaken the immune system
• immune system response

Synonyms

• defense system
• immune response
• host defense

Common mistakes

• Confusing 'immune system' with 'immune response', which is a part of it.
• Using it in contexts unrelated to health or biology.