Definitions from Wiktionary ( )

▸ noun:  (linguistics) Initialism of a number of proto-languages' names:
▸ noun:  Proto-Slavic.
▸ noun:  Proto-Semitic.
▸ noun:  Proto-Salish, Proto-Salishan.
▸ noun:  Proto-Sahaptian.
▸ noun:  (computing, file format) PostScript, a page description language.
▸ noun:  (organic chemistry) polystyrene
▸ noun:  metric horsepower
▸ noun:  (video games) Initialism of PlayStation. [(video games, trademark) A video game console of the "PlayStation" brand.]
▸ noun:  (software) Initialism of Photoshop. [(software, trademark) A raster graphics editor developed and published by Adobe Inc.]
▸ noun:  Initialism of postal service.
▸ noun:  (education) Initialism of public school. [(UK, Ireland, India) Certain private schools, particularly (initially) any grammar school operated apart from the personal lands of its students or (from the 19th century) the feepaying secondary schools which developed from or were modelled upon them; a British boarding school]
▸ noun:  (government) Initialism of public service(s).
▸ noun:  (video games) Initialism of PlayStation. [(video games, trademark) A video game console of the "PlayStation" brand.]
▸ noun:  (nautical) Initialism of paddle steamer. [(nautical) A steam-powered vessel propelled by one or two paddle wheels]
▸ noun:  Initialism of power supply. [Used other than figuratively or idiomatically: see power, supply.]
▸ noun:  (law enforcement, Commonwealth) Initialism of police sergeant, a police rank used in Commonwealth countries. [(law enforcement) A rank of law enforcement who supervises officers and handles daily precinct operations.]
▸ noun:  (sports) Initialism of parallel slalom. [(uncountable, skiing) A discipline of alpine skiing, a variant of slalom. A sport where two skiers compete head to head on parallel identical slalom courses.]
▸ noun:  Initialism of post scriptum, postscriptum, postscript. (initialism written at the end of a text as a footnote)
▸ adjective:  (telecommunications) Abbreviation of packet-switched.
▸ noun:  Alternative form of PS (post scriptum). [(linguistics) Initialism of a number of proto-languages' names:]
▸ noun:  (automotive, in classified ads) Abbreviation of power steering. [(automotive) A system for reducing the driver's effort to steer, by using a power source to assist in turning the wheels.]
▸ noun:  (New York City, slang) Abbreviation of projects (“multi-story low-income housing development”). [(US, usually preceded by the) One or more high-density urban housing developments for residents having low incomes.]

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