lookbook /ˈlʊkbʊk/noun 3verb 1forms 3 noun3 •A contiguous showcase of still images of a fashion designer or fashion brand’s collection.A new line called Suno replicated the staging of Mr. Sidibé’s photographs for its lookbook, right down to the checkerboard marble floor. — 2009 •A showcase of photographs etc. describing how a film should look. •(informal) A comprehensive directory of fashion-related companies and people, such as fashion designers, industry figures, brands and retail stores. verb1 •(informal) To locate fashion-related information by means of a directory.She lookbooked little black dresses in order to locate the one she wanted. formslookbooked · lookbooking · lookbooks