| Noun | 1. | retentiveness - the power of retaining and recalling past experience; "he had a good memory when he was younger" | |
| 2. | retentiveness - the property of retaining possessions that have been acquired | |
| 3. | retentiveness - the power of retaining liquid; "moisture retentivity of soil"urinary retention - holding urine in the urinary bladder; "he has a problem with urinary retention" | |