noun, noun or participle which takes 'suru', intransitive verb
return to the capital; return to Kyoto
Literary or historical term. 洛 is a classical name for Kyoto, so this word is used when someone returns to Kyoto, especially in historical or poetic contexts. In modern Japanese, 帰京 (ききょう) is more common for returning to Tokyo or Kyoto.
彼は長い旅を終えて帰洛した。
He returned to Kyoto after a long journey.
帰京 is the standard modern word for returning to the capital (Tokyo or Kyoto). 帰洛 is a literary/historical term specifically for returning to Kyoto.
From 帰 (return) + 洛 (classical name for Kyoto). The character 洛 originally referred to Luoyang in China, but was adopted as an elegant name for Kyoto.