What does the word retentive mean?

Usage examples for retentive

  1. And the business of the man from Diamond Town was to lounge about its neighbourhood, using those sharp light eyes of his to excellent purpose, and storing his retentive memory- for it would not do for a stranger to be caught putting pencil to paper in a town under Martial Law, and bristling with suspicion- with the information indispensable for the putting in effect of young Schenk Eybel's ingenious plan. – The Dop Doctor by Clotilde Inez Mary Graves
  2. His alert and retentive mind had seized, long ago, on Rowlatt's recommendation at the Little Bear Inn, and he had developed, perhaps half consciously, a half sense of humour. – The Fortunate Youth by William J. Locke