n. (also r) (pl. Rs or R's) the eighteenth letter of the alphabet.
Phrases and idioms:
the r months the months with r in their names (September to April) as the season for oysters.
abbr. (also R.)
1 Regina (Elizabeth R).
) registered as a trademark.
5 (in names of societies etc.) Royal.
6 Chess rook.
* * *R(ɑː(r))the eighteenth letter of the modern and seventeenth of the ancient Roman alphabet, is derived through early Greek egrho1, egrho2 from the Phoenician
Useful english dictionary. 2012.