2 n. — British Columbia, Yukon & Northwest Territories
a sidearm of a river; a bay cut off from the sea; a brackish body of water.
Type: 3. Semantic Change — West of the Rockies, the term has a different meaning and is used for more substantial bodies of water that remain in place year-round.
See also COD-2, s.v. "slough1" (3), which is marked "Cdn (BC)", Gage-1, s.v. "slough1" (3), which is marked "Cdn. in the Northwest".
See also: slough (DCHP-1) (defs. 2a, 2b, 2c & 3)
- Note how we combined defnitions 2a, 2b, 2c and 3 from DCHP-1 into DCHP-2's meaning 2.
- 1859  At Old Langley, the slough is entirely frozen up. The main channel is open down to New Langley.
- 1896  Here the moose remain till the deep snow drives them down to the lower ground, and eventually back to the river banks, where, if undisturbed, they pass the cold months without wandering far from some backwater or slough running up into the woods they have selected for winter quarters.
The old bulls shed their horns in the beginning of January, the young ones a month later. 
- 1908  Instead of brackish swamp water or salt sloughs, were clear-water lakes.
- 1957  Paul owned two sections on the shores of an immense slough known as Middle Lake that lies well to the east of Saskatoon.
- 1963  The cutthroats could start feeding on the first hatches of pink salmon fry in the sloughs and lower reaches of the rivers.
- 1984  They also scrounged for materials and did much of the welding as well. "It works like a charm," said Mr. Allen. "The fish returning upstream to spawn swim into a chamber that lifts them over the dam." There are about 60 kilometres of waterways linked to the river that drains Burnaby Lake and Deer Lake.
As a result of all of the work, the once-brackish sloughs have become clear-running streams again. Salmon and trout spawn again in the side channels of Stoney Creek, Eagle Creek, Still Creek and Deer Lake Creek. 
- 1996  So long as money was spent on studies, and permits were applied for, it was just fine to clearcut, scorch, tree farm, flood pristine valleys, clog marshes, streams and beaches with logging wastes, to spew pesticides, herbicides and poisoned bait across the countryside, to fish species after species to the brink of extermination, to channel river flows away from estuaries and sloughs, to bury wetlands such as Burns Bog under garbage and highways, and to spew chlorinated sewage into rivers we eat fish from. 
- 2009  The discovery of seven dead trumpeter swans in a slough east of Vancouver has led to a call for tougher penalties against those who shoot the majestic cream-coloured birds.
Environment Canada confirmed that someone had phoned in a report of several dead swans in the Nicomen Slough near Chilliwack. [...] The slough flows from the Fraser River around an island, and about 200 swans, as well as geese and ducks, winter there. 
- 2016  Extensive planning to raise the dike by one metre from Young Road at the Hope Slough, to the base of Chilliwack Mountain, kicked off this week with public meetings.