01 n. The quality of being manifest to the senses; external acts or appearances; regard for externals.
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1.
The quality of being manifest to the senses; external acts or appearances; regard for externals.“This externalism gave Catholicism a great advantage on all sides.” — E. Eggleston.
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2.
That philosophy or doctrine which recognizes or deals only with externals, or objects of sense perception; positivism; phenomenalism.(Metaph.)