non-rhotic

Adjective

 * 1) Of an accent, most often one of English: not pronouncing the written letter "r" unless it is followed by a vowel, as in Received Pronunciation, most other accents of England, the Boston accent, traditional NYC English, many accents of southern Louisiana, Australian English, etc.
 * In a non-rhotic accent, the word 'sort' can be pronounced like the word 'sought'.