one day

the daytime, during the day / a half day, half of a day

before the day is done

(rare) the first day of the month

all day, throughout the day, sunrise to sunset, all around the clock

expectation; anticipation / a forecast / an estimate / (mathematics) conjecture, hypothesis

expect; anticipate / estimate

rainfall

one day, 24 hours / the daytime, the period from dawn until dusk / (figuratively) a short period of time / one day, someday, an unspecified day / the first day of the month

(collective, chiefly attributive) Japan and China