"active radar" meaning in English

{
  "forms": [
    {
      "form": "active radars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "active radar (countable and uncountable, plural active radars)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "active lidar"
        },
        {
          "word": "active sonar"
        }
      ],
      "glosses": [
        "A type of radar that uses radio waves generated by the radar equipment, as contrasted with a passive type that uses only radio waves originating from elsewhere."
      ],
      "hypernyms": [
        {
          "word": "radar"
        },
        {
          "word": "imaging"
        }
      ],
      "id": "en-active_radar-en-noun-en:emissive_type_of_Q47528",
      "links": [
        [
          "radio wave",
          "radio wave"
        ],
        [
          "equipment",
          "equipment"
        ],
        [
          "passive",
          "passive"
        ]
      ],
      "senseid": [
        "en:emissive type of Q47528"
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "active radar"
}

{
  "forms": [
    {
      "form": "active radars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "active radar (countable and uncountable, plural active radars)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "coordinate_terms": [
        {
          "word": "active lidar"
        },
        {
          "word": "active sonar"
        }
      ],
      "glosses": [
        "A type of radar that uses radio waves generated by the radar equipment, as contrasted with a passive type that uses only radio waves originating from elsewhere."
      ],
      "hypernyms": [
        {
          "word": "radar"
        },
        {
          "word": "imaging"
        }
      ],
      "links": [
        [
          "radio wave",
          "radio wave"
        ],
        [
          "equipment",
          "equipment"
        ],
        [
          "passive",
          "passive"
        ]
      ],
      "senseid": [
        "en:emissive type of Q47528"
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "active radar"
}