Robinsonian UK /ˌɹɒbɪnˈsəʊ.ni.ən/US /ˌɹɑbɪnˈsoʊ.ni.ən/ adjective1 •Suggestive of the fictional Robinson Crusoe, a resourceful castaway on a desert island.The bringing in of “Friday,” or of one or more other persons, after analysis of strictly Robinsonian isolation, then serves to show how the addition of other persons affects the discussion. — 1982 formsmore Robinsonian · most Robinsonian