Etymology
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social (adj.)

c. 1400, "devoted to or relating to home life;" 1560s as "living with others," from French social (14c.) and directly from Latin socialis "of companionship, of allies; united, living with others; of marriage, conjugal," from socius "companion, ally," probably originally "follower," from PIE *sokw-yo-, suffixed form of root *sekw- (1) "to follow." Compare Old English secg, Old Norse seggr "companion," which seem to have been formed on the same notion). Related: Socially.

Sense of "characterized by friendliness or geniality" is from 1660s. Meaning "living or liking to live with others; companionable, disposed to friendly intercourse" is from 1720s. Meaning "of or pertaining to society as a natural condition of human life" first attested 1695, in Locke. Sense of "pertaining to fashionable society" is from 1873.

Social climber is from 1893; social work is 1890; social worker 1886. Social drinking first attested 1807. Social studies as an inclusive term for history, geography, economics, etc., is attested from 1916. Social security "system of state support for needy citizens" is attested from 1907 (the Social Security Act was passed by U.S. Congress in 1935). Social butterfly is from 1867, in figurative reference to "flitting."

Social contract (1763) is from translations of Rousseau. Social Darwinism attested from 1887. Social engineering attested from 1899. Social science is from 1785. In late 19c. newspapers, social evil is "prostitution." Social network is attested by 1971; social networking by 1984; social media by 2008. Social justice is attested by 1718.

I must introduce a parenthetical protest against the abuse of the current term 'social justice'. From meaning 'justice in relations between groups or classes' it may slip into meaning a particular assumption as to what these relations should be; and a course of action might be supported because it represented the aim of 'social justice', which from the point of view of 'justice' was not just. The term 'social justice' is in danger of losing its rational content—which would be replaced by a powerful emotional charge. I believe that I have used the term myself: it should never be employed unless the user is prepared to define clearly what social justice means to him, and why he thinks it just. [T.S. Eliot, footnote in "Notes Towards the Definition of Culture," 1948]
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gerontology (n.)

1903, coined in English from geronto-, used as combining form of Greek geron (genitive gerontos) "old man," from PIE root *gere- (1) "to grow old."

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social (n.)

"friendly gathering," 1870, from social (adj.). In late 17c. it meant "a companion, associate."

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psychosocial (adj.)

also psycho-social, "pertaining to or involving the influence of social factors on a person's mind or behavior," 1891, from psycho- + social (adj.).

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asocial (adj.)

1883, "antagonistic to society or social order," from a- (3) "not" + social (adj.); also compare antisocial.

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Zoroastrian (adj.)

1743, from Zoroaster, from Latin Zoroastres, from Old Persian Zarathushtra, 6c. or 7c. B.C.E. Persian religious teacher. The name appears to be literally "whose camels are old," from *zarant "old" (cognate with Greek geron, genitive gerontos "old;" see gerontology) + ushtra "camel." As a noun from 1811.

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antisocial (adj.)

also anti-social, "unsocial, averse to social intercourse," 1797, from anti- + social (adj.). The meaning "hostile to social order or norms" is from 1802. Other, older words in the "disinclined to or unsuited for society" sense include dissocial (1762), dissociable (c. 1600).

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hafla (n.)

in reference to belly-dance performance and social gathering, by 1998, from Arabic hafla "party, social or family gathering."

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anomie (n.)

"absence of accepted social values," 1915, in reference to Durkheim, who gave the word its modern meaning in social theory in French; a reborrowing with French spelling of anomy.

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