1650s, "public department in charge of letter-carrying," from post (n.3) + office. Meaning "building where postal business is carried on, office or place where letters are received for transmission," is from 1650s. In slang or euphemistic sense of "a sexual game" it refers to an actual parlor game first attested early 1850s in which pretend "letters" were paid for by kisses.
"dominant female entity, mistress," attested since 1560s, but rare until late 20c., and not in quite the usual modern sense:
[A]s religion, the supreme dominatrix, exercises her salutary influence on every department of individual and social life, there is no branch of our culture in which Christianity has not effected important meliorations. [Brownson's Quarterly Review, October 1850]
late 14c., polet, "young fowl" (late 13c. as a surname), from Anglo-French pullet, Old French poulette, poilette, diminutive of poule, poille "hen," from Vulgar Latin *pulla, fem. of Latin pullus "young animal," especially "young fowl" (source also of Spanish pollo "chicken," Italian pollo "fowl;" from PIE root *pau- (1) "few, little." Compare pony.
A cockerel is a male bird under one year old, a cock over one year old. A hen is a female over one year old and a pullet under one year old. [U.S. Department of Agriculture, "Practical Poultry Production," 1920]
c. 1200, "protector, defender," from Old North French warant "defender; surety, pledge; justifying evidence" (Old French garant), from Frankish *warand, from Proto-Germanic *war- "to warn, guard, protect" (source also of Old High German werento "guarantor," noun use of present participle of weren "to authorize, warrant;" German gewähren "to grant"), from PIE root *wer- (4) "to cover."
Sense evolved via notion of "permission from a superior which protects one from blame or responsibility" (early 14c.) to "document conveying authority" (1510s). A warrant officer in the military is one who holds office by warrant (as from a government department), rather than by commission (from a head of state).
Xerography: Inkless printing and dry photography—named "xerography," from the Greek words for "dry" and "writing"—were recently demonstrated in the United States. Described as "revolutionary" by the New York Times, xerography employs static electricity to record images on special metal plates, and dry powders to reproduce the images on other surfaces. [U.S. Department of State "Air Bulletin," No. 79, vol. 2, Nov. 17, 1948]
c. 1600, "territory over which dominion is exerted," from French domaine "domain, estate," from Medieval Latin domanium "domain, estate," from Latin dominium "property, dominion," from dominus "lord, master, owner," from domus "house" (from PIE root *dem- "house, household"). A later borrowing from French of the word which became demesne.
Sense of "dominion, province of action" is from 1727. Meaning "range or limits of any department of knowledge or sphere of action" is from 1764. Internet domain name is attested by 1985. Via the notion of "ownership of land" comes legal eminent domain "ultimate or supreme lordship over all property in the state" is attested from 1738.
early 15c., "income from property or possessions," from Old French revenue "a return," noun use of fem. past participle of revenir "come back" (10c.), from Latin revenire "return, come back," from re- "back" (see re-) + venire "to come" (from a suffixed form of PIE root *gwa- "to go, come").
The meaning "public income, annual income of a government or state" is recorded from 1680s; revenue sharing was popularized from 1971, the Nixon Administration's policy of returning power to state and local governments by steering federal taxpayer money to them. Revenuer "U.S. Department of Revenue agent," the bane of Appalachian moonshiners, is attested by 1880.
Meaning "department of the royal household or of a monastic house in charge of stored meats" is mid-15c. Figurative use, in reference to a "storehouse" of anything, is by 1620s. Surname Lardner "person in charge of a larder" is attested from mid-12c., from Middle English lardyner, from Medieval Latin lardenarius "steward."