de·sign·er / dəˈzīnər/ • n. a person who plans the form, look, or workings of something before its being made or built, typically by drawing it in detail: he's one of the world's leading car designers. ∎ [as adj.] made by or having the expensive sophistication of a famous and prestigious fashion designer: a designer label. ∎ [as adj.] upscale and fashionable: designer food.