Define ignition temperature.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Concept**: The term "ignition temperature" refers to a specific temperature point related to combustion.

2. **Definition**: Ignition temperature is defined as the minimum temperature at which a substance begins to burn or ignite.

3. **Importance**: This temperature is crucial because it indicates the point at which a material can catch fire and sustain combustion.

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