noun
oak tree
Refers to the oak tree, especially the species Quercus dentata (Japanese emperor oak). Often used in poetry and place names.
神社の境内には大きな柏木が立っている。
A large oak tree stands in the shrine grounds.
noun
imperial palace guard (archaic)
Archaic term for a guard at the imperial palace. Not used in modern Japanese outside historical contexts.
古文書には柏木という役職が記されている。
The ancient document records a position called 'kashiwagi' (imperial palace guard).