scarlet runner bean n 1: tropical American bean with red flowers and mottled black beans similar to Phaseolus vulgaris but perennial; a preferred food bean in Great Britain [syn: {scarlet runner}, {scarlet runner bean}, {Dutch case-knife bean}, {runner bean}, {Phaseolus coccineus}, {Phaseolus multiflorus}] 2: long bean pods usually sliced into half-inch lengths; a favorite in Britain [syn: {scarlet runner}, {scarlet runner bean}, {runner bean}, {English runner bean}]