What Does "Sweep the Earth" Mean?

Here’s what “sweep” means:

–verb (used with object)
1. to move or remove (dust, dirt, etc.) with or as if with a broom, brush, or the like.
2. to clear or clean (a floor, room, chimney, etc.) of dirt, litter, or the like, by means of a broom or brush.
3. to drive or carry by some steady force, as of a wind or wave: The wind swept the snow into drifts.
4. to pass or draw (something) over a surface with a continuous stroke or movement: The painter swept a brush over his canvas.
5. to make (a path, opening, etc.) by clearing a space with or as if with a broom.
6. to clear (a surface, place, etc.) of something on or in it (often fol. by of): to sweep a sea of enemy ships.
7. to pass over (a surface, region, etc.) with a steady, driving movement or unimpeded course, as winds, floods, etc.: sandstorms sweeping the plains.
8. to search (an area or building) thoroughly: Soldiers swept the town, looking for deserters.
9. to pass the gaze, eyes, etc., over (a region, area, etc.): His eyes swept the countryside.
10. to direct (the eyes, gaze, etc.) over a region, surface, or the like: He swept his eyes over the countryside.
11. to examine electronically, as to search for a hidden listening device.
12. to win a complete or overwhelming victory in (a contest): Johnson swept the presidential election of 1964.
13. to win (every game, round, hand, etc., of a series of contests): The Yankees swept the three-game series.
14. Music.
a. to pass the fingers or bow over (a musical instrument, its strings or keys, etc.), as in playing.
b. to bring forth (music) thus.
–verb (used without object)
15. to sweep a floor, room, etc., with or as if with a broom: The new broom sweeps well.
16. to move steadily and strongly or swiftly (usually fol. by along, down, by, into, etc.).
17. to move or pass in a swift but stately manner: Proudly, she swept from the room.
18. to move, pass, or extend in a continuous course, esp. a wide curve or circuit: His glance swept around the room.
19. to conduct an underwater search by towing a drag under the surface of the water.
20. Aeronautics. (of an airfoil or its leading or trailing edge) to project from the fuselage at an angle rearward or forward of a line perpendicular to the longitudinal axis of the aircraft.