adjective: (linguistics, of an English accent) That allows the phoneme /ɹ/ even when not followed by a vowel, as in bar (/bɑːɹ/) and bard or barred (/bɑːɹd/); (of an English speaker) who speaks with such an accent.
adjective: (linguistics, phonetics, of a phoneme) Having a sound quality associated with the letter R; having the sound of any of certain IPA symbols, including /ɹ/, /ɻ/, /ɚ/, /ɝ/ and /r/.
noun: (phonetics) A rhotic consonant or rhotic vowel (R-coloured vowel).
