A dislocation construction is a °sentence construction in which one of the forms occurs at the margin, necessarily as a separate intonational unit, but could alternatively occur integrated into the clause.
In the European languages, "dislocation" has generally been used for constructions in which the dislocated expression is taken up in the core part of the clause by a "resumptive pronoun". However, not all languages have such resumptive pronouns, and these are not excluded by the current definition.
“Dislocations are constituents in the periphery of the clause – or, depending on the analysis, outside the structure of the clause proper. In the canonical cases, they are doubled by a functional bundle and they are separated from the core clause by an intonational phrase boundary.” (López 2016)
"Dislocations are constructions in which some phrasal constituent appears at the (outer) left or right edge of a complete clause, that is, a clause without a gap." (Fernández-Sánchez & Ott 2020)