#1 retentiveness n. [memory, retention, retentivity] the power of retaining and recalling past experience; "he had a good memory when he was younger". wn
#2 retentiveness n. [retentivity] the property of retaining possessions that have been acquired. wn
#3 retentiveness n. [retentivity, retention] the power of retaining liquid; "moisture retentivity of soil". wn
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