tamper [tampered, tampering, tampers]◼◻◻(alter by making unauthorized changes) verb [UK: ˈtæm.pə(r)] [US: ˈtæm.pər]The lock on my drawer had been tampered with and some of my papers were missing. = On avait bricolé la serrure de mon tiroir et certains de mes papiers étaient manquants.