Pars pro toto (Latin for 'a part (taken) for the whole'; /ˌpɑːrz proʊ ˈtoʊtoʊ/;^[1] Latin: [ˈpars proː ˈtoːtoː]),^[2] is a figure of speech where the name of a portion of an object, place, or concept is used or taken to represent its entirety. It is distinct from a merism, which is a reference to a whole by an enumeration of parts; metonymy, where an object, place, or concept is called by something or some place associated with it; or synecdoche, which can refer both to pars pro toto and its inverse: Totum pro parte (Latin for 'the whole for a part').

In the context of language, pars pro toto means that something is named after a part or subset of it, or after a limited characteristic, which in itself is not necessarily representative of the whole. For example, "glasses" is a pars pro toto name for something that consists of more than literally just two pieces of glass (the frame, nosebridge, temples, etc. as well as the lenses). Pars pro toto usage is especially common in political geography, with examples including "Russia" or "Russians", referring to the political institution (both historially and contemporary) or its people; "Holland" for the Netherlands; and, particularly in languages other than English, using the translation of "England" in that language to refer to Great Britain or the United Kingdom. Among English-speakers, "Britain" is a common pars pro toto shorthand for the United Kingdom.

An example of a pars pro toto in geography is the use of the capital to refer generally to the country such as Washington for the United States, Beijing for China, or Moscow for Russia. When the capital is used to refer specifically to the country's government, the figure of speech is a metonymy rather than a pars pro toto.

Certain place names are sometimes used as synecdoches to denote an area greater than that warranted by their strict meaning:

• "Aotearoa" for New Zealand
• "Antigua" for Antigua and Barbuda
• "Austria" for the former Austro-Hungarian Empire or the Habsburg-ruled lands
• "The Balkans" to include historically related parts of southeastern Europe as well as the Balkan Peninsula, or for the countries that made up the former Yugoslavia
• "Bohemia" for the former Czech lands, now the Czech Republic
• "Bosnia" for Bosnia and Herzegovina
• "Denmark" for the erstwhile Kingdom of Denmark–Norway
• "Great Britain" for the United Kingdom
• "Holland" for the Netherlands – see Netherlands (terminology)
• Jawadwipa (Java), Swarnadwipa (Sumatra), and Sunda Islands (Java, Sumatra, Kalimantan, Bali, East & West Nusa Tenggara), for Indonesia (all of those and Papua & Maluku Islands)
  • Java, for the main island and the surrounding islands (Madura, Thousand Islands, and hundred others) under the jurisdiction of the 6 provinces in Indonesia
  • Sumatra, for the main island and the surrounding islands (Nias, Bangka, Belitung, etc.)
  • Kalimantan, Sulawesi, Papua, for the main islands and the surrounding islands
• "Laurentia" for Canada
• "Monte Carlo" for Monaco
• "Muscovy" for Russia
• "Naples" for the former Kingdom of the Two Sicilies
• "Newfoundland" for what is now called Newfoundland and Labrador
• "Patagonia" for the entirety of the Southern Cone
• "Peru" for the former Inca Empire and the Viceroyalty or Kingdom of Peru
• "Piedmont" or "Sardinia" for the former Kingdom of Sardinia
• "Poland" for the former Polish–Lithuanian Commonwealth
• "Prussia" for the former German Empire
• "Russia" (or "Soviet Russia") for the former Soviet Union
• "Saint Helena" for Saint Helena, Ascension, and Tristan da Cunha
• "Saint Vincent" for Saint Vincent and the Grenadines
• "São Tomé" for São Tomé and Príncipe
• "Scandinavia" for the Nordic countries or Fennoscandia
• "Serbia" (or "Yugoslav Serbia") for the former Yugoslavia or Serbia and Montenegro
• "South America" for the partially overlapping concept of Latin America
• "South Pole" for Antarctica
• "Sweden" for the former Sweden-Norway
• "Tahiti" for French Polynesia
• "Taiwan" for the (Free area of the) Republic of China, which consists of Penghu, Kinmen, Matsu, and the island of Taiwan
• "Tel Aviv" for Tel Aviv - Yafo
• "Trinidad" for Trinidad and Tobago
• "Turkey" for the former Ottoman Empire

• "Yankee" for all Americans (despite the original meaning of the word being of an inhabitant of New England)
• "Franks" for all Western Europeans (used in the Muslim world throughout the medieval and early modern periods)
• "Alemanni" for all Germanic peoples (used first by the Romans and later by the speakers of Romance languages)

Body parts are often colloquially used to refer to the whole body, as in:

• "skin" ("save your skin")
• "hide" ("the teacher will have my hide")
• "mouth" ("mouth to feed")
• "head" ("head count")
• "face" ("famous faces")
• "hand" ("all hands on deck")
• "eyeballs" (television audience)
• "guts" ("hate someone's guts")
• "back" ("get off my back")
• "brain" for intelligence or a smart person, as in "the class brain" or "the brains of the operation" or "where's your brain"
• "neck" ("save one's neck")
• "butt" or "ass", used to indicate a person's entire self or body ("get your butt on a plane" or "the boss fired my ass")
• "body" for a whole person, as in "can't a body have some peace and quiet?"
• "soul", meaning a whole person, as "don't tell a soul"

The names of affiliates or subdivisions of large corporations are sometimes used to refer to the entire corporation:

• Chevrolet, Holden (in Oceania), or Opel (in Europe) to represent the entirety of General Motors, where using the most common GM brand in each region represents the entirety of General Motors
• Activision or Blizzard to refer to holding parent company Activision Blizzard

Other examples include an individual object being used to refer to a larger object or group of which it is a part:

• "bread" for food in general, as in "my job puts bread in my children's mouths"
• "pork bellies" for commodities to be traded
• "Big Ben" for Elizabeth Tower
• "motor" for automobile (as in the corporation General Motors or the word "Motors" used in the name of a car dealership)
  • similarly, "wheels" for automobile, "jet" for jet(-propelled) airplane, "sail" for sailing ship
• "gun" used to refer to the shooter as well as his firearm (e.g., "he was a hired gun")

• Metonymy
• Synecdoche
• Totum pro parte
• Geographical renaming