undercurrent UK /ˈʌndəkʌɹ(ə)nt/US /ˈʌndɚˌkʌɹənt/noun 2verb 1forms 3 noun2 •A current of water which flows under the surface, and often in a different direction from surface currents. •(figurative) A tendency of feeling or opinion that is concealed rather than exposed.The meeting was pervaded with an undercurrent of dread, as the managers tried not to admit that firings were looming. verb1 •To flow under some surface.The latter are stoically steady, impervious to the nervousness that still continues to undercurrent the Stock Exchange generally, despite an all-round rally. — 1905 formsundercurrented · undercurrenting · undercurrents