Babban tafkin Gishiri yana nufin wani babban tafkin ruwan gishiri dake arewacin jihar Utah ta Amurka. An yi amfani da kalmar “mai girma” don jaddada girma da mahimmancin tafkin, kuma “gishiri” yana nufin yawan gishirin ruwansa. “Tafki” babban ruwa ne da ke kewaye da ƙasa. Don haka, ana iya ayyana Babban Tekun Gishiri a matsayin babban tafkin ruwan gishiri da ke arewacin Utah, Amurka.
