Paranoid/ˈpærənɔɪd/ Definition 1 of 2Pro Tip 1/3Emotional Charge Paranoid has a negative emotional connotation, suggesting irrational fear or worry. He was paranoid that he'd lose his job for a small mistake. Pro Tip 2/3Unfounded Suspicion Use 'paranoid' to describe unjustified distrust towards others or situations. She felt paranoid about her phone being tapped despite no evidence. Pro Tip 3/3Not Always Negative Sometimes 'paranoid' conveys carefulness, as in avoiding unnecessary risks. They were considered paranoid for always backing up their computer files.