<br />Retention is The condition of retaining (keeping) something. Retention rate is used to count customers and track customer activity irrespective of the number of transactions (or dollar value of those transactions) made by each customer. (Source: WikiPedia)
Merriam-Webster Online Dictionary
retention (noun)1.
a) the act of retaining the state of being retained
b) abnormal retaining of a fluid or secretion in a body cavity
2.
a) power of retaining - retentiveness
b) an ability to retain things in mind , specifically a preservation of the aftereffects of experience and learning that makes recall or recognition possible
3.
something retained
