Purification (noun)

1. The act or process of purifying something, or of becoming pure.
2. The act of making something pure, free from dirt, impurities, or unwanted substances.
3. The act of purging something of guilt or impurities.

Origin:

From middle english purificacioun, from old french purification, from latin purificatio, from purificare ("to cleanse, to purif.y")

Examples:

1. The purification of water is an essential step in making it safe to drink.
2. The purification of the air is vital for human health.
3. The priest performed the purification ritual on the new temple.
4. He believed that purification of the soul could only be achieved through meditation.
5. The purification process for the chemical removed all impurities.