"slick down" meaning in English

{
  "forms": [
    {
      "form": "slicks down",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "slicking down",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "slicked down",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "slicked down",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "slick down (third-person singular simple present slicks down, present participle slicking down, simple past and past participle slicked down)",
      "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 phrasal verbs formed with \"down\"",
          "parents": [],
          "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": "Hair",
          "orig": "en:Hair",
          "parents": [
            "Body parts",
            "Body",
            "Anatomy",
            "All topics",
            "Biology",
            "Medicine",
            "Fundamental",
            "Sciences",
            "Healthcare",
            "Health"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1967, Barbara Sleigh, Jessamy, Sevenoaks, Kent: Bloomsbury, published 1993, →ISBN, page 96:",
          "text": "His unruly hair was slicked down with water, and as Jessamy introduced him to Miss Brindle his face assumed a cherubic innocence which would immediately have aroused the suspicions of anyone who knew him.",
          "type": "quote"
        }
      ],
      "glosses": [
        "To make hair flat by putting oil, water, etc. on it."
      ],
      "id": "en-slick_down-en-verb-UbRbNsTn",
      "links": [
        [
          "hair",
          "hair#English"
        ],
        [
          "flat",
          "flat#English"
        ],
        [
          "oil",
          "oil#English"
        ],
        [
          "water",
          "water#English"
        ]
      ],
      "related": [
        {
          "word": "slick back"
        }
      ]
    }
  ],
  "word": "slick down"
}

{
  "forms": [
    {
      "form": "slicks down",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "slicking down",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "slicked down",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "slicked down",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "slick down (third-person singular simple present slicks down, present participle slicking down, simple past and past participle slicked down)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "related": [
    {
      "word": "slick back"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English phrasal verbs",
        "English phrasal verbs formed with \"down\"",
        "English terms with quotations",
        "English verbs",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Hair"
      ],
      "examples": [
        {
          "ref": "1967, Barbara Sleigh, Jessamy, Sevenoaks, Kent: Bloomsbury, published 1993, →ISBN, page 96:",
          "text": "His unruly hair was slicked down with water, and as Jessamy introduced him to Miss Brindle his face assumed a cherubic innocence which would immediately have aroused the suspicions of anyone who knew him.",
          "type": "quote"
        }
      ],
      "glosses": [
        "To make hair flat by putting oil, water, etc. on it."
      ],
      "links": [
        [
          "hair",
          "hair#English"
        ],
        [
          "flat",
          "flat#English"
        ],
        [
          "oil",
          "oil#English"
        ],
        [
          "water",
          "water#English"
        ]
      ]
    }
  ],
  "word": "slick down"
}