semiconscious Syllabification: (sem·i·con·scious)Pronunciation: /ˌsemēˈkänSHəs, ˌsemˌī-/Translate semiconscious | into French | into Italian | into Spanish Definition of semiconscious adjective (of a person) only partially conscious:he dragged out the semiconscious pilot (of a feeling or memory) of which the person experiencing it is only vaguely or partially aware:semiconscious obsessionsDerivatives semiconsciousness noun semiconscious in other Oxford dictionaries Definition of semiconscious in the British & World English dictionary