Ma'anar ƙamus na kalmar "kankara floe" babban ƙanƙara ce mai ɗorewa wanda ya rabu da babban ƙanƙara kuma yana shawagi a saman ruwan. Yawanci ana samun shi a yankunan polar, irin su Arctic ko Antarctic, kuma yana iya zama haɗari ga jiragen ruwa da sauran jiragen ruwa don kewayawa.
