Construct a sentence to explain what plagiarism is.
Plagiarism is the act of using someone else's words or ideas without giving proper credit and presenting them as one's own.
Complete the following task based on the instruction and optional input provided.### Instruction:
Construct a sentence to explain what plagiarism is.

### Output:
Plagiarism is the act of using someone else's words or ideas without giving proper credit and presenting them as one's own.