one day

(archaic) second-person personal pronoun: you

human / person / people / individual / man / woman / someone

(literary) they (about women or girls)

importance

one, 1 / the first in order, foremost / the beginning / the best / a kind of; one of something / (card games) an ace / unity / the bottom string of a shamisen or other Japanese musical instrument

single room

Alternative form of 一々

post office; postal centre

broadcasting station: radio station, TV station, etc.