image (n.)youdaoicibaDictYouDict
c. 1200, "piece of statuary; artificial representation that looks like a person or thing," from Old French image "image, likeness; figure, drawing, portrait; reflection; statue," earlier imagene (11c.), from Latin imaginem (nominative imago) "copy, statue, picture," figuratively "idea, appearance," from stem of imitari "to copy, imitate" (see imitation).

Meaning "reflection in a mirror" is early 14c. The mental sense was in Latin, and appears in English late 14c. Sense of "public impression" is attested in isolated cases from 1908 but not in common use until its rise in the jargon of advertising and public relations, c. 1958.
Madison AvenueyoudaoicibaDictYouDict
"values and business of advertising and public relations," 1954, from the street in Manhattan, laid out c. 1836 and named for U.S. President James Madison. The concentration of advertising agencies there seems to date from the 1940s.
PR (n.)youdaoicibaDictYouDict
also p.r.; 1942, abbreviation of public relations (see public).
public (adj.)youdaoicibaDictYouDict
late 14c., "open to general observation," from Old French public (c. 1300) and directly from Latin publicus "of the people; of the state; done for the state," also "common, general, public; ordinary, vulgar," and as a noun, "a commonwealth; public property," altered (probably by influence of Latin pubes "adult population, adult") from Old Latin poplicus "pertaining to the people," from populus "people" (see people (n.)).

Early 15c. as "pertaining to the people." From late 15c. as "pertaining to public affairs;" meaning "open to all in the community" is from 1540s in English. An Old English adjective in this sense was folclic. Public relations first recorded 1913 (after an isolated use by Thomas Jefferson in 1807). Public office "position held by a public official" is from 1821; public service is from 1570s; public interest from 1670s. Public-spirited is from 1670s. Public enemy is attested from 1756. Public sector attested from 1949. Public funds (1713) are the funded debts of a government.

Public school is from 1570s, originally, in Britain, a grammar school endowed for the benefit of the public, but most have evolved into boarding-schools for the well-to-do. The main modern meaning in U.S., "school (usually free) provided at public expense and run by local authorities," is attested from 1640s. For public house, see pub.