noun, adverb
half a ri; halfway
Historically, a unit of distance equal to half a ri (about 1.96 km). In modern usage, it can also mean 'halfway' in a more general sense, often used adverbially.
昔の旅人は一日に半道ほど歩いた。
Travelers in the old days walked about half a ri in a day.
目的地まで半道のところで休憩した。
We took a break halfway to our destination.