1650s, "a whole comprised of interconnected parts," from complex (adj.). Latin completus as a noun meant "a surrounding, embracing, connection, relation." Psychological sense of "connected group of repressed ideas" was established by C.G. Jung, 1907.

"single-masted native vessel used on Arabian Sea," later widely applied to all Arab vessels, 1799, original language and meaning unknown. Klein suggests a relation to Persian dav "running."

1742, "to be reciprocally related" (intransitive), back-formation from correlation, or else a verbal use of the noun. Transitive sense of "to place in reciprocal relation" is by 1849. Related: Correlated; correlating; correlative.

early 15c., relatif, "having reference (to something), relating, depending upon," from Old French relatif and directly from Late Latin relativus "having reference or relation," from Latin relatus, used as past participle of referre "bring back, bear back" (see refer), from re- "back, again" + lātus "borne, carried" (see oblate (n.)).

Meaning "having mutual relationship, connected with each other" is from 1590s; that of "arising from or determined by relationship to something else" is from 1610s; that of "having or standing in a relation to something else" is from 1650s; that of "not absolute or existing by itself" is by 1704. In grammar, "referring to an antecedent," from 1520s.

"deprive of the character of being established," 1590s, especially, of a church, "withdraw from exclusive state recognition or privileges" (1832), from dis- + establish. Related: Disestablishment "act of withdrawing (a church) from a privileged relation to the state" (1747; in a non-specific sense, of laws, from 1734); disestablishmentarian (1874).