The state of having equal or shared authority with another person or group, where two or more parties jointly hold power or decision-making responsibility.
From 'co-' (Latin prefix meaning 'together') + 'authority' (from Latin 'auctoritas' meaning power or influence). The term emerged in modern usage to describe shared governance structures that became increasingly common in organizations and institutions.
This word reveals how power is changing in modern society—rather than one boss ruling everything, we're seeing co-CEOs, co-directors, and co-leaders become normal, showing that complementary expertise often beats individual control.
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