1. the quality or state of being pure; freedom from anything that contaminates or pollutes
2. freedom from moral fault or guilt; innocence
3. freedom from foreign or extraneous matter; being unmixed
Usage: often used in scientific contexts

Examples

• The purity of the mountain spring water was remarkable.
• She admired the purity of his intentions.
• The laboratory tested the purity of the chemical sample.
• The white dress symbolized purity and innocence.
• Gold purity is measured in karats.
• The purity of her voice moved the audience to tears.
• Environmental regulations ensure the purity of drinking water.