In grammar a predicate is a part of a sentence. See sentence.
In Bertrand Russell's theory of types, a predication is an act of typing, that is, assigning a type. A definite description in fact contains a claim of existence.
This is a disambiguation page; that is, one that just points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page.