RI
Proposed by a contributor, not yet supported by evidence.
Also seen as: ris
Sense 1
rex imperator (“king-emperor”) or regina imperatrix (“queen-empress”); the initials by which a British monarch signed documents after his or her name from 1877 until 1947.
Noun
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 2
A Korean unit of distance equivalent to about 393 m.
Noun
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 3
The solfeggio syllable used to indicate the sharp of the second note of a major scale, enharmonic to me.
Ngôn từ solfeggio chỉ nốt thứ hai trong thang nhạc
Machine-translated — suggest a fix
Noun
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “RI” mean?
rex imperator (“king-emperor”) or regina imperatrix (“queen-empress”); the initials by which a British monarch signed documents after his or her name from 1877 until 1947.
Is “RI” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.