1. the action of copying or reproducing something exactly
2. an exact copy or reproduction of something
3. unnecessary repetition of work or effort

Examples

• The duplication of the ancient manuscript took several months.
• We need to avoid duplication of effort between the two departments.
• The artist created a perfect duplication of the famous painting.
• The duplication of files on the server was causing storage issues.
• Her work involved the duplication of important legal documents.
• The company eliminated duplication in their manufacturing process.
• The duplication of the experiment confirmed the original results.