WordWeb Online

1. Play around with or alter or falsify, usually secretively or dishonestly
   "Someone tampered with the documents on my desk";
   - fiddle [informal], monkey
    
2. Intrude in other people's affairs or business; interfere unwantedly
   "Don't tamper in my affairs!";
   - meddle

1. A tool for compacting or pressing down
   - tamp, tamping bar

Derived forms: tampers, tampering, tampered

Type of: interfere, interpose, intervene, manipulate, step in, tool

Encyclopedia: Tamper