characterized by or related to a state of catatonia, which involves a lack of communication and movement, often associated with schizophrenia and other mental illnesses;
e.g. The doctor prescribed medications for his catatonic schizophrenia.
(adjective)
characterized by an unresponsive or immobile state, marked by a stupor or a lack of activity, movement, or expression;
e.g. He entered a catatonic state when he received the shocking news about his close friend.