/rɪˈtenʃn/
re·ten·tion AW
BrE /rɪˈtenʃn/
NAmE /rɪˈtenʃn/
[U] (formal)
the action of keeping sth rather than losing it or stopping it
The company needs to improve its training and retention of staff.
the action of keeping liquid, heat, etc. inside sth rather than letting it escape
Eating too much salt can cause fluid retention.
the ability to remember things
Visual material aids the retention of information.
➡ see also retain