1. n., pl. of spectrum.

A given item or phenomenon may fall within several spectra, depending on the quality measured. Was the murder scene bloodier or less bloody than others, was it more or less crowded when the police arrived? And, or, perhaps, it can be profitably used in social/cultural theory to denote a quality that is measured or defined differently by group or by individual: resulting in the ability of one person to fall on different spots relative to others' spectra of gender.

2. Someone failing to pronounce spectre correctly.