The phrase "unifying thread" refers to something that connects or brings together different elements or ideas. It is like a common theme or idea that ties everything together and makes them work as a whole. Full definition
(São Paulo, Brazil) Appropriations and interpretations of human and natural forms provide unifying thread in group show, presenting works by Alice Miceli, Berna Reale, Bruno Dunley, Raul Mourão, Rodolpho Parigi and Virginia de Medeiros. (pipaprize.com)
«Nearly all of the people who had had a near - death experience — no matter if it was 10 years ago or 50 — were still absolutely convinced their lives had meaning and that there was a universal, unifying thread of love which provided that meaning. (discovermagazine.com)
The only unifying thread amongst the works is the age range of the artists who made them, resulting in an exhibition that is almost disorienting in its wide stylistic and thematic breadth. (creators.vice.com)