(computer science) the name given to a computer file in order to distinguish it from other files; may contain an extension that indicates the type of file
"The programmer saved the document as filename.txt so the operating system could recognize it as a text file."
The name assigned to a file in a file system.
"The filename stored on my hard drive is report_final.docx."
In plain English: A filename is just the specific name you give to a file so your computer can find it easily.
"Please rename your filename to something more descriptive before uploading it."
Usage: A filename identifies a specific file within a directory, distinguishing it from other files with the same content or type. Unlike general names that may be descriptive phrases, filenames often include extensions like .txt or .jpg to indicate format and must follow operating system rules regarding length and special characters.