1. relating to or located at the zenith; directly overhead
Usage: astronomy; geography

Examples

• The zenithal position of the sun occurs at solar noon.
• Astronomers use zenithal measurements to calculate celestial coordinates.
• The satellite passed through a zenithal angle of zero degrees.
• Zenithal projection maps show the Earth as viewed from directly above.
• The telescope was adjusted to capture the zenithal star position.
• Solar panels achieve maximum efficiency at zenithal sun angles.