Retention is the act or condition of keeping or containing something.
1.An example of retention is a dam holding back a river.
2.An example of retention is someone being held in a rehabilitation center.
3.An example of retention is memory
________________________________________
1.The act of retaining or the condition of being retained: the retention of nutrients in the soil; the retention of jobs in the city.
2.The practice of requiring a student to repeat a class or a year of school because of insufficient educational progress to advance.
3.The ability to recall or recognize what has been learned or experienced; memory.
4.The inability of a person or animal to eliminate a bodily waste.