"ft-lb" meaning in English

{
  "forms": [
    {
      "form": "ft-lbs",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "ft-lb",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "s",
        "2": "*"
      },
      "expansion": "ft-lb (plural ft-lbs or ft-lb)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "foot-pound"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English words spelled without vowels",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of foot-pound."
      ],
      "id": "en-ft-lb-en-noun-AfDm5PtB",
      "links": [
        [
          "foot-pound",
          "foot-pound#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "ft-lb"
}

{
  "forms": [
    {
      "form": "ft-lbs",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "ft-lb",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "s",
        "2": "*"
      },
      "expansion": "ft-lb (plural ft-lbs or ft-lb)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "foot-pound"
        }
      ],
      "categories": [
        "English abbreviations",
        "English countable nouns",
        "English entries with incorrect language header",
        "English indeclinable nouns",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English nouns with irregular plurals",
        "English words spelled without vowels",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "Abbreviation of foot-pound."
      ],
      "links": [
        [
          "foot-pound",
          "foot-pound#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "ft-lb"
}