cardiorespiratory UK /ˌkɑː.dɪ.əʊ.ɹɪˈspɪ.ɹət.ə.ɹi/US /ˌkɑɹ.di.oʊˈɹɛs.pɚ.ə.tɔɹ.i/ adjective1 •Pertaining to the heart and breathing.