retention

Universal Words noun [U] (formal) 1 the action of keeping sth rather than losing it or stopping it: The company needs to improve its training and retention of staff. 2 the action of keeping liquid, heat, etc. inside sth rather than letting it escape: Eating too much salt can cause fluid retention. * the importance of energy conservation and heat retention 3 the ability to remember things: Visual material aids the retention of information. seealsoRETAIN