What does 一日 mean?
一日 is a Japanese noun meaning “one day (duration)” in English. It is written as 一日 in kanji, いちにち in hiragana, and ichinichi in romaji. This word is part of JLPT N5 vocabulary.
Example sentence
私は、月・水・金と一日おきに仕事をします。
I work every other day: Monday, Wednesday, and Friday.