I. ˈder-ə-ˌlikt, ˈde-rə- adjective
Etymology: Latin derelictus, past participle of derelinquere to abandon, from de- + relinquere to leave — more at relinquish
Date: 1649
1. : abandoned especially by the owner or occupant ; also : run-down
2. : lacking a sense of duty : negligent
II. noun
Date: 1670
1.
a. : something voluntarily abandoned ; especially : a ship abandoned on the high seas
b. : a tract of land left dry by receding water
2. : a destitute homeless social misfit : vagrant , bum