1a movable indicator on a computer screen identifying the point that will be affected by input from the user.
2chiefly historical the transparent slide engraved with a hairline that is part of a slide rule and is used for marking a point on the rule while bringing a point on the central sliding portion up to it.
Origin:
Middle English (denoting a runner or running messenger): from Latin, 'runner', from curs-(see cursive). sense 2 dates from the late 16th century
