early 15c., ayre lome, a hybrid from heir + loom (n.) in its original but now otherwise obsolete sense of "implement, tool," extended to mean "article." Technically, some piece of property that by will or custom passes down with the real estate. General sense of "anything handed down from generation to generation" is from 1610s.
1728 in legal sense, "extinguishment by absorption," originally of real estate titles, from merge (v.), on analogy of French infinitives used as nouns (see waiver). From 1889 in the business sense "extinguishment of a security for a debt by the creditor's acceptance of a higher security;" not common until c. 1926. General meaning "any act of merging" is by 1881.
"person who cheats or robs sailors ashore," 1769, from land (n.) + shark (n.). Smyth ("Sailor's Word-book," 1867) lists the types as "Crimps, pettifogging attorneys, slopmongers, and the canaille infesting the slums of seaport towns." As "land-grabber, speculator in real estate" from 1839. In both senses often in Australian and New Zealand publications during 19c.
late 14c. (mid-14c. in Anglo-French), "one of the common people, a member of the third estate," agent noun from common (v.) "participate in common, associate or have dealings with" (mid-14c.), from common (adj.). From mid-15c. as "member of the House of Commons."
"one who has been given authority to manage," mid-15c., administratour, from Old French administrateur or directly from Latin administrator "a manager, conductor," agent noun from past-participle stem of administrare "to manage, control, superintend" (see administer). The estate sense is earliest. For ending, see -er.
1540s, "quality of being real, objective reality," from French réalité and directly from Medieval Latin realitatem (nominative realitas), from Late Latin realis (see real (adj.)). Also compare realty, which was the older form of the word in the sense of "reality" (mid-15c.).
Meaning "real existence, what is real, the aggregate of all that is real" is from 1640s; that of "the real state (of something)" is from 1680s. Sometimes 17c.-18c. it also meant "sincerity." Reality-based is attested from 1960, in marriage counseling. Reality television is attested from 1991.
1610s, "bring into existence, make or cause to become real," also "exhibit the actual existence of," from French réaliser "make real" (16c.), from real "actual" (see real (adj.)). The sense of "understand clearly, comprehend the reality of" is recorded by 1775. Sense of "obtain, amass, bring or get into actual possession" (money, profit, etc.) is from 1753. Related: Realized; realizing.
"real things, actual facts," 1952, neuter plural of Late Latin realis "actual, real" (see real (adj.)). Earlier (1950, American English), "objects which may be used as teaching aids but were not made for the purpose" [OED].
1728, from the Unami Delaware (Algonquian) native designation, said to mean literally "original person," from /len-/ "ordinary, real, original" + /-a:p:e/ "person." Sometimes in extended form Lenni Lenape, with /leni-/ "real."