"non-rhotic" meaning in English

{
  "categories": [
    {
      "kind": "other",
      "name": "Terms prefixed with non-",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "non",
        "2": "rhotic"
      },
      "expansion": "non- + rhotic",
      "name": "ety-prefix"
    }
  ],
  "etymology_text": "non- + rhotic",
  "forms": [
    {
      "form": "non-rhotic",
      "tags": [
        "positive"
      ]
    },
    {
      "form": "–",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "–",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "glosses": [
        "If a dialect (form of a language) or accent is non-rhotic, it only pronounces the rhotic sound for the letter R when it is before a vowel (more precisely, the rhotic sound is pronounced if \"r\" or \"rh\" is immediately followed by a vowel – which also means it is always pronounced at the start of a word). Most British accents in England and Wales are non-rhotic (with the notable exception of West-Country accents), as are all Australian accents and most accents of Massachusetts, New Hampshire, Rhode Island and Maine in New England, United States."
      ],
      "id": "simple-non-rhotic-en-adj-SQOeC5Jh"
    }
  ],
  "word": "non-rhotic"
}

{
  "categories": [
    "Terms prefixed with non-"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "non",
        "2": "rhotic"
      },
      "expansion": "non- + rhotic",
      "name": "ety-prefix"
    }
  ],
  "etymology_text": "non- + rhotic",
  "forms": [
    {
      "form": "non-rhotic",
      "tags": [
        "positive"
      ]
    },
    {
      "form": "–",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "–",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "glosses": [
        "If a dialect (form of a language) or accent is non-rhotic, it only pronounces the rhotic sound for the letter R when it is before a vowel (more precisely, the rhotic sound is pronounced if \"r\" or \"rh\" is immediately followed by a vowel – which also means it is always pronounced at the start of a word). Most British accents in England and Wales are non-rhotic (with the notable exception of West-Country accents), as are all Australian accents and most accents of Massachusetts, New Hampshire, Rhode Island and Maine in New England, United States."
      ]
    }
  ],
  "word": "non-rhotic"
}