Cassiar noun3 •(historical) A historical region in northwest British Columbia, Canada, site of an 1870's gold rush; in full, Cassiar Country. •Ellipsis of the Cassiar Land District: a cadastral division in northwest British Columbia, Canada, named after the historic Cassiar Country region. •Ellipsis of the Cassiar Mountains: a mountain group in the Cassiar Land District, in northwest British Columbia, Canada, named after the district.
