Secretive/ˈsiːkrətɪv/ Definition 1 of 3Pro Tip 1/3Personal Matters Used when someone is intentionally quiet about their personal life or feelings. Despite being friends, he remained secretive about his past. Pro Tip 2/3Trust Issues May imply a person doesn't trust others with their information or has something to hide. She was secretive and never shared her ideas with the team. Pro Tip 3/3Mystery Aura Can create an air of mystery, making others more curious about the secretive person. His secretive nature made everyone speculate about his absence.