"m/s" meaning in Conventions internationales

{
  "categories": [
    {
      "kind": "other",
      "name": "Symboles en conventions internationales",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Conventions internationales",
      "orig": "conventions internationales",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "word": "m/s²"
    },
    {
      "word": "m/s/s"
    }
  ],
  "etymology_texts": [
    "De m, symbole du mètre, et de s, symbole de la seconde."
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "symbol",
  "pos_title": "Symbole",
  "related": [
    {
      "word": "cm/s"
    },
    {
      "word": "km/h"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "word": "m⋅s⁻¹"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en français",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Lexique en conventions internationales de la métrologie",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "1 m/s est exactement 3,6 km/h."
        }
      ],
      "glosses": [
        "Variante de m⋅s⁻¹, symbole du mètre par seconde, unité de mesure de vitesse du Système international (SI)."
      ],
      "id": "fr-m/s-conv-symbol-dtL-OKio",
      "tags": [
        "alt-of"
      ],
      "topics": [
        "metrology"
      ]
    }
  ],
  "word": "m/s"
}

{
  "categories": [
    "Symboles en conventions internationales",
    "conventions internationales"
  ],
  "derived": [
    {
      "word": "m/s²"
    },
    {
      "word": "m/s/s"
    }
  ],
  "etymology_texts": [
    "De m, symbole du mètre, et de s, symbole de la seconde."
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "symbol",
  "pos_title": "Symbole",
  "related": [
    {
      "word": "cm/s"
    },
    {
      "word": "km/h"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "word": "m⋅s⁻¹"
        }
      ],
      "categories": [
        "Exemples en français",
        "Lexique en conventions internationales de la métrologie"
      ],
      "examples": [
        {
          "text": "1 m/s est exactement 3,6 km/h."
        }
      ],
      "glosses": [
        "Variante de m⋅s⁻¹, symbole du mètre par seconde, unité de mesure de vitesse du Système international (SI)."
      ],
      "tags": [
        "alt-of"
      ],
      "topics": [
        "metrology"
      ]
    }
  ],
  "word": "m/s"
}