swallow up verb3 •To completely enclose or envelop. •To take over or absorb something (especially an organisation) so it no longer has a separate identity; to assimilate.Yes, there were hundreds of companies in existence, but a form of natural selection was taking place. Weaker companies were swallowed up by larger ones. — 2024 •To voraciously consume resources, such as money; to devour. formsswallowed up · swallowing up · swallows up