mid-century modernadjective
also Mid-Century Modern uk/ˌmɪd.sen.tʃər.i ˈmɒd.ən//ˌmɪd.sen.tʃər.i ˈmɑː.dɚn/specializedbelonging to the style of architecture (= buildings) and design popular around the middle of the 20th century:
His showroom specializes in mid-century modern furniture, lighting, and accessories.
a Mid-Century Modern building with vertical walls of glass topped by a metal roof