Real Dictionary

cursor
countable noun: On a computer screen, the cursor is a small shape that indicates where anything that is typed by the user will appear.

cursor in American English
a movable indicator light on a computer video screen, that marks the current position at which a character may be entered, changed, etc.
noun: a movable, sometimes blinking, symbol that indicates the position on a CRT or other type of display where the next character entered from the keyboard will appear, or where user action is needed, as in the correction of an erroneous character already disp

cursor in British English
noun: the sliding part of a measuring instrument, esp a transparent sliding square on a slide rule