Oxford Advanced American Dictionary

Definition of file noun from the Oxford Advanced Learner's Dictionary

Oxford3000Academic

file

noun
file pronunciation English faɪl file pronunciation American faɪl
 
1 a box or folded piece of card for keeping loose papers together and in ordera box fileA stack of files awaited me on my desk.2 a collection of information stored together in a computer, under a particular nameto access/copy/create/delete/download/save a fileEvery file on the same disk must have a different name. see also PDF3 a file and the information it contains, for example about a particular person or subjectsecret police filesYour application will be kept on file (= in a file, to be used later).file on somebody to have/open/keep a confidential file on somebodyPolice have reopened the file (= have started collecting information again) on the missing girl.4 a metal tool with a rough surface for cutting or shaping hard substances or for making them smooth5 a line of people or things, one behind the otherThey set off in file behind the teacher.
Idioms

(in) single file

(also old-fashioned (in) Indian file) (in) one line, one behind the otherThey made their way in single file along the cliff path.