RETENTION

[noun] [U] [slightly formal]Retention is the continued use, existence or possession of something or someone.The retention of old technology has slowed the company's growth.Two influential senators have argued for the retention of the unpopular tax.To aid staff recruitment and retention, the education authority has increased the number of nursery places available for teachers' children.The sea's retention of heat is greater than the land's.She suffers from water retention (= the continued presence of too much water in the body).