Does enlightenment mean achieving purity?

Usually, the word enlightenment is not directly understandable; a newcomer might understand incorrectly. In the Visuddhimagga (Path to Purification, p. 6), Nibbana is illustrated as follows: > "Herein, purification should be understood as Nibbana, which being > devoid of all stains, is utterly pure." On page seven it is further explained as follows: > "Formations are all impermanent: When he sees thus with understanding > And turns away from what is ill, That is the path to purity" Are enlightenment and Nibbana the same? If so, does enlightenment mean achieving purity?