"underfill" meaning in English

{
  "antonyms": [
    {
      "word": "overfill"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "under",
        "3": "fill"
      },
      "expansion": "under- + fill",
      "name": "prefix"
    }
  ],
  "etymology_text": "From under- + fill.",
  "forms": [
    {
      "form": "underfills",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "underfilling",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "underfilled",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "underfilled",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "underfill (third-person singular simple present underfills, present participle underfilling, simple past and past participle underfilled)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with under-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "To fill with an insufficient amount."
      ],
      "id": "en-underfill-en-verb-RqcYHErH",
      "links": [
        [
          "fill",
          "fill"
        ]
      ],
      "raw_glosses": [
        "(transitive) To fill with an insufficient amount."
      ],
      "tags": [
        "transitive"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "to fill with insufficient amount",
          "word": "alitäyttää"
        }
      ]
    }
  ],
  "sounds": [
    {
      "audio": "LL-Q1860 (eng)-Flame, not lame-underfill.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/fc/LL-Q1860_%28eng%29-Flame%2C_not_lame-underfill.wav/LL-Q1860_%28eng%29-Flame%2C_not_lame-underfill.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/fc/LL-Q1860_%28eng%29-Flame%2C_not_lame-underfill.wav/LL-Q1860_%28eng%29-Flame%2C_not_lame-underfill.wav.ogg"
    },
    {
      "rhymes": "-ɪl"
    }
  ],
  "word": "underfill"
}

{
  "antonyms": [
    {
      "word": "overfill"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "under",
        "3": "fill"
      },
      "expansion": "under- + fill",
      "name": "prefix"
    }
  ],
  "etymology_text": "From under- + fill.",
  "forms": [
    {
      "form": "underfills",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "underfilling",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "underfilled",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "underfilled",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "underfill (third-person singular simple present underfills, present participle underfilling, simple past and past participle underfilled)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English terms prefixed with under-",
        "English transitive verbs",
        "English verbs",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Rhymes:English/ɪl",
        "Rhymes:English/ɪl/3 syllables",
        "Terms with Finnish translations"
      ],
      "glosses": [
        "To fill with an insufficient amount."
      ],
      "links": [
        [
          "fill",
          "fill"
        ]
      ],
      "raw_glosses": [
        "(transitive) To fill with an insufficient amount."
      ],
      "tags": [
        "transitive"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "LL-Q1860 (eng)-Flame, not lame-underfill.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/fc/LL-Q1860_%28eng%29-Flame%2C_not_lame-underfill.wav/LL-Q1860_%28eng%29-Flame%2C_not_lame-underfill.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/fc/LL-Q1860_%28eng%29-Flame%2C_not_lame-underfill.wav/LL-Q1860_%28eng%29-Flame%2C_not_lame-underfill.wav.ogg"
    },
    {
      "rhymes": "-ɪl"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "to fill with insufficient amount",
      "word": "alitäyttää"
    }
  ],
  "word": "underfill"
}