c. 1300, "a type of meat pie, a pie covered with paste or pie crust," especially one of venison or other seasoned meat, from Old French paste "dough, pastry," from Vulgar Latin *pastata "meat wrapped in pastry" from Latin pasta "dough, paste" (see pasta).
1610s, "small sweet cake made of ground almonds (instead of flour) and whites of eggs," from French macaron (16c.), from dialectal Italian maccarone, the name of a kind of pasty food made of flour, cheese, and butter (see macaroni). The French meaning is said to have been introduced 1552 by Rabelais. The -oon ending was conventional in 15c.-17c. English to add emphasis to borrowings of French nouns ending in stressed -on.
1630s, "type of plasterer's fine paste or cement," from French potée "polishing powder" (12c.), originally "pot-full, contents of a pot," from Old French pot "container" (see pot (n.1)).
From 1660s as "powder used for polishing glass or metals." The meaning "soft pasty mixture for sealing window panes" is recorded by 1706. Figurative use in reference to one easily influenced is from 1924. Putty knife, one with a blunt, flexible blade, used by glaziers, etc., for laying on putty, is attested from 1834.
"tube-shaped food made of dried wheaten paste" [Klein], 1590s, from southern Italian dialectal maccaroni (Italian maccheroni), plural of maccarone, name for a kind of pasty food made of flour, cheese, and butter, possibly from maccare "bruise, batter, crush," which is of unknown origin, or from late Greek makaria "food made from barley."
Originally known as a leading food of Italy (especially Naples and Genoa), it was used in English by 1769 to mean "a fop, a dandy" ("typical of elegant young men" would be the sense in "Yankee Doodle") because it was an exotic dish in England at a time when certain young men who had traveled the continent were affecting French and Italian fashions and accents (and were much mocked for it).
There is said to have been a Macaroni Club in Britain by 1764, composed of young men who sought to introduce elegancies of dress and bearing from the continent, which was the immediate source of this usage in English. Hence the extended use of macaroni as "a medley; something extravagant to please idle fancy" (by 1884).