It can refer to:
* A person who translates: "El traductor interpretó la conversación para los turistas." (The translator interpreted the conversation for the tourists.)
* The act of translating: "La traducción del libro fue excelente." (The translation of the book was excellent.)
* A translation software: "Usé un traductor online para entender el artículo." (I used an online translator to understand the article.)
The word "traductor" is masculine, so you would use the definite article "el" before it.