1) International strait 2) Strait of Iceland 3) Strait of the Arctic Ocean 
The Denmark Strait or Greenland Strait (Danmarksstrædet, Grænlandssund, the latter meaning Greenland Sound) is an oceanic strait between Iceland (to its southeast) and Greenland (to its northwest). The Norwegian island of Jan Mayen lies northeast of the strait. It connects the Greenland Sea, an extension of the Arctic Ocean, to the Irminger Sea,...
channel partially within the Arctic Circle, lying between Greenland (west) and Iceland (east). About 180 miles (290 km) wide at its narrowest point, ...
a strait between Iceland and Greenland. 130 mi. (210 km) wide.