(euphemistic) DC Comics (in the context of its rivalry with Marvel Comics)

(motor racing) A caution (“yellow flag”) flown during a race to separate a race into different stages. During the yellow period, standard caution flag rules apply.

(economics) A theoretical type of market structure, where there are many firms providing homogeneous goods or services, resulting in allocative and productive efficiency in the long run.

(economics) A type of market structure that shares both characteristics of perfect competition and that of monopoly depending on the time frame (long-run or short-run).

(economics) A competitive strategy in which firms deliberately don't engage in price reductions, but rather compete in advertising, quality, or design etc.

plural of wet t-shirt competition

A contest in which women wear t-shirts that are wet to make them clingy and slightly translucent, and others judge the women on appearance.