dumbphone UK /ˈdʌm.fəʊn/US /ˈdʌm.foʊn/ noun1 •(informal) A cell phone that does not have any functionality characteristic of a smartphone.The Boring Phone is part of a new dumbphone boom, built on the suspicion of gen Z towards the data- and attention-harvesting technologies they have grown up with. — 2024 formsdumbphones