file (v.1)

"place (papers) in consecutive order for future reference," mid-15c., from Old French filer "string documents on a thread or wire for preservation or reference" (15c.), earlier "to spin thread," from fil "thread, string" (12c.), from Latin filum "a thread, string; thread of fate; cord, filament," from PIE *gwhis-lom, suffixed form of root *gwhi- "thread, tendon." The notion is of documents hung up on a line in consecutive order for ease of reference.

File (filacium) is a threed or wyer, whereon writs, or other exhibits in courts, are fastened for the better keeping of them. [Cowel, "The Interpreter," 1607]

Methods have become more sophisticated, but the word has stuck. Meaning "place among the records of a court or office" is from 1510s; of newspaper reporters sending in stories, 1954. Intransitive sense "march in a line (as soldiers do) one after another" is from 1610s. Related: Filed; filing.

file (n.1)

1520s, "string or wire on which documents are strung," from French file "a row" (15c.), noun derived from filer "string documents; spin thread" (see file (v.1)). The literal sense explains why from the beginning until recently things were generally on file (or upon file). The meaning "collection of papers systematically arranged for ready reference" is from 1620s; computer sense is from 1954. The sense "row of persons or things one behind another" (1590s) is originally military, from the French verb in the sense of "march in file." Meaning "line of squares on a chessboard running directly from player to player" is from 1610s.

file (n.2)

metal tool for abrading or smoothing, Old English feol (Mercian fil) "file," from Proto-Germanic *fihalo "cutting tool" (source also of Old Saxon fila, Old High German fila, Middle Dutch vile, Dutch vijl, German Feile), probably from PIE root *peig- "to cut, mark by incision" (source also of Old Church Slavonic pila "file, saw," Lithuanian piela "file"). Century Dictionary (1906) lists 60 named varieties of them. Nail file (for the fingernails) is by 1819.

file (v.2)

"to smooth or abrade with a file," early 13c., from Old English filian, from the source of file (n.2). Related: Filed; filing.

Definitions of file
file (v.)
record in a public office or in a court of law;
file a complaint
file for divorce
Synonyms: register
file (v.)
smooth with a file;
file one's fingernails
file (v.)
proceed in line;
The students filed into the classroom
file (v.)
file a formal charge against;
Synonyms: charge / lodge
file (v.)
place in a container for keeping records;
Synonyms: file away
file (n.)
a set of related records (either written or electronic) kept together;
Synonyms: data file
file (n.)
a line of persons or things ranged one behind the other;
Synonyms: single file / Indian file
file (n.)
office furniture consisting of a container for keeping papers in order;
Synonyms: file cabinet / filing cabinet
file (n.)
a steel hand tool with small sharp teeth on some or all of its surfaces; used for smoothing wood or metal;