"flush left" meaning in English

{
  "antonyms": [
    {
      "word": "flush right"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "flush left (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Typography",
          "orig": "en:Typography",
          "parents": [
            "Printing",
            "Writing",
            "Industries",
            "Human behaviour",
            "Language",
            "Business",
            "Human",
            "Communication",
            "Economics",
            "Society",
            "All topics",
            "Social sciences",
            "Fundamental",
            "Sciences"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alignment of the text aligned along the left margin or gutter."
      ],
      "id": "en-flush_left-en-adj-puChtv6-",
      "links": [
        [
          "typography",
          "typography"
        ],
        [
          "Alignment",
          "alignment"
        ],
        [
          "text",
          "text"
        ],
        [
          "left",
          "left"
        ],
        [
          "margin",
          "margin"
        ],
        [
          "gutter",
          "gutter"
        ]
      ],
      "raw_glosses": [
        "(typography) Alignment of the text aligned along the left margin or gutter."
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "media",
        "publishing",
        "typography"
      ]
    }
  ],
  "word": "flush left"
}

{
  "antonyms": [
    {
      "word": "flush right"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "flush left (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English uncomparable adjectives",
        "en:Typography"
      ],
      "glosses": [
        "Alignment of the text aligned along the left margin or gutter."
      ],
      "links": [
        [
          "typography",
          "typography"
        ],
        [
          "Alignment",
          "alignment"
        ],
        [
          "text",
          "text"
        ],
        [
          "left",
          "left"
        ],
        [
          "margin",
          "margin"
        ],
        [
          "gutter",
          "gutter"
        ]
      ],
      "raw_glosses": [
        "(typography) Alignment of the text aligned along the left margin or gutter."
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "media",
        "publishing",
        "typography"
      ]
    }
  ],
  "word": "flush left"
}