The Collaborative International Dictionary of English v.0.48:

Cursor \Cur"sor\ (k?r"s?r), n. [L., a runner. See Cursitor.]
   Any part of a mathematical instrument that moves or slides
   backward and forward upon another part.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cursor
    n 1: (computer science) indicator consisting of a movable spot
         of light (an icon) on a visual display; moving it allows
         the user to point to commands or screen positions [syn:
         cursor, pointer]

The Free On-line Dictionary of Computing (30 December 2018):

cursor

   1.  A visually distinct mark on a display indicating
   where newly typed text will be inserted.  The cursor moves as
   text is typed and, in most modern editors, can be moved around
   within a document by the user to change the insertion point.

   2.  In SQL, a named control structure used by an
   application program to point to a row of data.  The position
   of the row is within a table or view, and the cursor is
   used interactively so select rows from columns.

   (1996-12-27)