"needn't" meaning in All languages combined

{
  "categories": [
    {
      "kind": "other",
      "name": "英語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "英語 縮約形",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "contraction",
  "pos_title": "縮約形",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "英語 英国英語",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "need not"
      ],
      "id": "ja-needn't-en-contraction-sA7ryS-~",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "needn't"
}

{
  "categories": [
    "英語",
    "英語 縮約形"
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "contraction",
  "pos_title": "縮約形",
  "senses": [
    {
      "categories": [
        "英語 英国英語"
      ],
      "glosses": [
        "need not"
      ],
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "needn't"
}