/ˌhaɪpərˈventɪleɪt/ hyper·ven·ti·late BrE /ˌhaɪpəˈventɪleɪt/ NAmE /ˌhaɪpərˈventɪleɪt/ [I] (specialist) to breathe too quickly because you are very frightened or excited ▸ hyper·ven·ti·la·tion BrE /ˌhaɪpəˌventɪˈleɪʃn/ NAmE /ˌhaɪpərˌventɪˈleɪʃn/ [U]