一日 yīrì one day (point in time) Definitions Defs Origin Strokes Stroke Words Sentences Sents yīrì one day (point in time) 一 yī numeral one one; the number 1; single; alone日 rì noun date a specific day of the month; a special day like a festival or birthdayyīrì one day (duration) 一 yī numeral one one; the number 1; single; alone日 rì nounadverb day a 24-hour period; the time it takes for the earth to rotate once on its axisyīrì once 一 yī adverb [as soon as] Used to show that as soon as one action or situation happens, another follows immediately.日 rì noun past (literary) in the past; formerlyyīrì one daytime 一 yī numeral one one; the number 1; single; alone日 rì nounadverb daytime daytime; the period between sunrise and sunset as opposed to night