someone who shares a prisoncell with someone else 〔住在同一间牢房里的〕狱友
Examples from the Corpus
cellmate• With the departure of her cellmate, FourthAunt experienced the anxieties of loneliness.• Her cellmate said nothing as she lay motionless on her cot, staring at the ceiling.• He and his cellmate were repeatedly tortured.• This was Bobby Dupard, his cellmate in the brig in Atsugi.• His cellmateslept through the tragedy.• Martin and Gail are more like cellmates than soulmates.• Soon after being remanded to Pentonville Prison he was attacked by his psychoticcellmate who had set fire to the cell.