<p><strong>adjective</strong></p><ul><li>of or relating to glaciers or ice sheets.</li><li>resulting from or associated with the action of ice or glaciers: glacial terrain.</li><li>characterized by the presence of ice in extensive masses or glaciers.</li><li>bitterly cold; icy: a glacial winter wind.</li><li>happening or moving extremely slowly: The work proceeded at a glacial pace.</li><li>icily unsympathetic or immovable: a glacial stare; glacial indifference.</li><li>of, relating to, or tending to develop into icelike crystals: glacial phosphoric acid.</li></ul>