​KembaraXtra-Computer Terms – block cursor:
A block cursor is a type of on-screen cursor that occupies the entire area of a character cell in text mode displays. Unlike a thin vertical line cursor, it appears as a rectangular block covering the space of a character.
Block cursors are commonly used in text-based applications to indicate the current insertion point. In some systems, they may also function as the pointer for a mouse within text-mode interfaces.