retention

1 ENTRIES FOUND:
retention /rɪˈtɛnʃən/ noun
retention
/rɪˈtɛnʃən/
noun
Britannica Dictionary definition of RETENTION
[noncount] formal
1 
a  : the act of keeping someone or something
b  : the act of keeping extra liquid, heat, etc., inside the body
2 
: the ability to keep something
3 
: the ability to remember things easily or for a long time