Definition of RI in English:

RI

Syllabification: RI

abbreviation

1Rex et Imperator (King and Emperor) or Regina et Imperatrix (Queen and Empress).
[Latin]
1.2Royal Institute or Institution.

Definition of RI in:

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Word of the day flagitious
Pronunciation: fləˈdʒɪʃəs
adjective
(of a person or their actions) criminal; villainous