The quality of being logically consistent and forming a unified whole, both in thinking and in one's sense of self. In psychology, it refers to how well different aspects of personality, memory, and experience fit together meaningfully.
From Latin 'cohaerere' meaning 'to stick together, be connected.' The word entered English in the 16th century but gained psychological significance in the 20th century through narrative therapy and research on psychological well-being and sense-making.
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