file copy noun

1. A copy filed for reference
2. An editor's copy of a book in which errors, possible changes, etc are noted

file extension noun (computing)

A series of characters that follows the dot in a filename and identifies the file type

fileˈ-leader noun

The person at the head of a file

fileˈname noun (computing)

A name used to refer to a given collection of data

file server noun (computing)

A computer in a network that stores files and makes them available to users in a network

file sharing noun (computing)

The activity of making files freely available for other users on a computer network while also downloading files made available by others

filing cabinet noun

A cabinet for storing files

file off

To wheel off at right angles to the original or previous direction

file with (archaic)

To rank with or be equal to

on file

On record, catalogued

single file or Indian file

One behind another