The act of binding or tying to something; an attachment or connection.
From Latin adlegāre (to bind to), from ad- (to) + legāre (to tie, bind). The noun form uses the Latin suffix -tiō indicating an action or state.
This is a wonderfully specific medieval legal term—when documents were 'adlegated' to a case, they were literally bound to it, and the word captured both the physical and legal binding.
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