Definition of "adjunction" []

• The act of joining; the thing joined or added. (noun)
• A form of similarity between a pair of categories mapped to each other by dual morphisms. (noun)

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• "The negation operator ¬X can be introduced from the last adjunction."
• "He half turned his head for a moment and I then perceived that he had become unrecognisable owing to the adjunction to his cheeks of enormous red pockets which prevented him from opening his mouth and his eyes properly, so much so that I stood stupefied not wanting to show that I noticed this sort of anthrax to which it was more becoming that he should allude first."
• "The adjunction of water at this stage perturbs the ongoing chemical process."