"hard drop" meaning in English

{
  "forms": [
    {
      "form": "hard drops",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "hard drop (plural hard drops)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Tetris",
          "orig": "en:Tetris",
          "parents": [
            "Video games",
            "Games",
            "Mass media",
            "Software",
            "Recreation",
            "Culture",
            "Media",
            "Computing",
            "Human activity",
            "Society",
            "Communication",
            "Technology",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Video games",
          "orig": "en:Video games",
          "parents": [
            "Games",
            "Mass media",
            "Software",
            "Recreation",
            "Culture",
            "Media",
            "Computing",
            "Human activity",
            "Society",
            "Communication",
            "Technology",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A manual downward motion of a piece in the video game Tetris that makes it land immediately (that is, within only one frame)."
      ],
      "id": "en-hard_drop-en-noun-UUNbKjQY",
      "links": [
        [
          "downward",
          "downward"
        ],
        [
          "piece",
          "piece"
        ],
        [
          "Tetris",
          "Tetris"
        ],
        [
          "land",
          "land"
        ],
        [
          "frame",
          "frame"
        ]
      ]
    }
  ],
  "word": "hard drop"
}

{
  "forms": [
    {
      "form": "hard drops",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "hard drop (plural hard drops)",
      "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",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Tetris",
        "en:Video games"
      ],
      "glosses": [
        "A manual downward motion of a piece in the video game Tetris that makes it land immediately (that is, within only one frame)."
      ],
      "links": [
        [
          "downward",
          "downward"
        ],
        [
          "piece",
          "piece"
        ],
        [
          "Tetris",
          "Tetris"
        ],
        [
          "land",
          "land"
        ],
        [
          "frame",
          "frame"
        ]
      ]
    }
  ],
  "word": "hard drop"
}