wireline noun2 •A wire that runs from a drill rig down into the drill hole to support a dead load or other downhole tool.Most manufacturers of wirelines will construct specially designed armored electrical conductor wirelines for unique downhole operations. — 2005 •Synonym of landline.AT&T rose 16 cents, to $36.79, after the company reported a 17 percent increase in fourth-quarter profit and growth in wireless subscribers and in its regional wireline businesses. — 2007 formswirelines