flag (n.1)

"cloth ensign," late 15c., now in all modern Germanic languages (German Flagge, Dutch vlag, Danish flag, Swedish flagg, etc.) but apparently first recorded in English, of unknown origin, but likely connected to flag (v.1) or else an independent imitative formation "expressing the notion of something flapping in the wind" [OED]. A guess considered less likely is that it is from flag (n.2) on the notion of being square and flat.

Meaning "name and editorial information on a newspaper" is by 1956. U.S. Flag Day (1894) is in reference to the adopting of the Stars and Stripes by the Continental Congress on June 14, 1777.

flag (v.1)

1540s, "flap about loosely," probably a later variant of Middle English flakken, flacken "to flap, flutter" (late 14c.), which probably is from Old Norse flaka "to flicker, flutter, hang loose," itself perhaps imitative of something flapping lazily in the wind. The sense of "go limp, droop, become languid" is attested by 1610s. Related: Flagged; flagging.

flag (n.2)

"flat stone for paving," c. 1600, ultimately from Old Norse flaga "stone slab," from Proto-Germanic *flago- (from extended form of PIE root *plak- (1) "to be flat"). Earlier in English as "piece cut from turf or sod" (mid-15c.), from Old Norse flag "spot where a piece of turf has been cut out," from flaga.

flag (n.3)

plant growing in moist places, late 14c., "reed, rush," perhaps from Scandinavian (compare Danish flæg "yellow iris") or from Dutch flag; perhaps ultimately connected to flag (v.1) on notion of "fluttering in the breeze."

flag (v.2)

1875, "place a flag on or over," from flag (n.1). Meaning "designate as someone who will not be served more liquor," by 1980s, probably from use of flags to signal trains, etc., to halt, which led to a verb meaning "inform by means of signal flags" (1856, American English). Meaning "to mark so as to be easily found" is from 1934 (originally by means of paper tabs on files). Related: Flagged; flagger; flagging.

updated on June 14, 2022

Definitions of flag from WordNet
flag (n.)
emblem usually consisting of a rectangular piece of cloth of distinctive design;
flag (n.)
a listing printed in all issues of a newspaper or magazine (usually on the editorial page) that gives the name of the publication and the names of the editorial staff, etc.;
Synonyms: masthead
flag (n.)
plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals;
Synonyms: iris / fleur-de-lis / sword lily
flag (n.)
a rectangular piece of fabric used as a signalling device;
Synonyms: signal flag
flag (n.)
flagpole used to mark the position of the hole on a golf green;
Synonyms: pin
flag (n.)
stratified stone that splits into pieces suitable as paving stones;
Synonyms: flagstone
flag (n.)
a conspicuously marked or shaped tail;
flag (v.)
communicate or signal with a flag;
flag (v.)
provide with a flag;
flag (v.)
droop, sink, or settle from or as if from pressure or loss of tautness;
Synonyms: sag / droop / swag
flag (v.)
decorate with flags;
the building was flagged for the holiday
flag (v.)
become less intense;
Synonyms: ease up / ease off / slacken off
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