1. (n.) A post or station outside the limits of a camp, for observation of the enemy\.

2. (n.) The troops placed at such a station.

Berlin wall China Darkest Africa God knows where Greenland North Pole Outer Mongolia Pago Pago Pillars of Hercules Siberia South Pole Thule Tierra del Fuego Timbuktu Ultima Thule Yukon advance guard airhead alentours ambience ambit antipodes armed guard avant-garde back country backwoods bamboo curtain bank guard battle line beachhead boondock boondocks border border ground borderland borderlands bridgehead brush bush country bushveld circle circuit circumambiencies circumjacencies circumstances coast guard compass context cordon cordon sanitaire entourage environing circumstances environment environs farthest outpost first line forefront forests front front line front rank front-runner frontier frontier post garrison gestalt goalie goalkeeper goaltender godforsaken place guard guarder guardsman habitat hinterland inlying picket iron curtain jailer jumping-off place line march marches marchland milieu neighborhood nowhere outback outer space outguard outposts outskirts perimeter periphery picket pioneer point pole precincts precursor purlieus railhead rear guard scout security guard situation spearhead suburbs surroundings the Great Divide the South Seas the boondocks the bush the moon the sticks the tullies three-mile limit timbers total environment train guard twelve-mile limit uninhabited region up-country van vanguard vicinage vicinity virgin land virgin territory warder wasteland wild West wilderness wilds woodlands woods