builder UK /ˈbɪl.də/US /ˈbɪl.dəɹ/noun 4forms 1phrases 1 noun4 •One who builds or constructs things. •Master artisan, who receives his instructions from the architect, and employs workers. •Software that allows the user to create a certain kind of (often automated) output.To cut coding time and to insure maintainability of the algorithms, an "algorithm builder tool" was constructed. — 1987 •(rare) Clipping of bodybuilder.In the competitions, bodybuilders go through "mandatories"—a set of mandatory poses—in the morning, where the judges compare the body parts of the builders. — 1991 formsbuilders Phrases with builder bridge-builderA builder of bridges.