What is meant by the following terms ?
Scouring

Explanation

**Step-by-Step Solution:**

1. **Understanding the Context**: The term "scouring" is related to the processing of wool after it has been sheared from sheep. It is important to know the sequence of wool processing to understand scouring.

2. **Definition of Shearing**: Before scouring, the wool is obtained through a process called shearing, where the fleece (wool) and the skin layer are removed from the sheep.

3. **Definition of Scouring**: Scouring is the next step after shearing. It involves cleaning the sheared wool to remove impurities such as dirt, grease, and other contaminants.

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