- up; on; on top; upon; first; previous or last; upper; higher; above; previous; to climb; to go into; to go up
to know; to be aware astronomy; celestial objects; the heavensunder; next; lower; below; underneath; down(wards); to go down; latter to know; to be aware geography; geographical features; topography simp. and trad.
上 知 天文 ， 下 知 地理 Literally: “know the astronomy above, and know the geography below”.
- describes someone who is very learned; a polymath