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apparatus

American  
[ap-uh-rat-uhs, -rey-tuhs] / ˌæp əˈræt əs, -ˈreɪ təs /

noun

plural

apparatus, apparatuses
  1. a group or combination of instruments, machinery, tools, materials, etc., having a particular function or intended for a specific use.

    Our town has excellent fire-fighting apparatus.

  2. any complex instrument or mechanism for a particular purpose.

    Synonyms:
    contrivance, contraption, device, appliance, machine
  3. any system or systematic organization of activities, functions, processes, etc., directed toward a specific goal.

    the apparatus of government; espionage apparatus.

  4. Physiology. a group of structurally different organs working together in the performance of a particular function.

    the digestive apparatus.


apparatus British  
/ ˌæpəˈreɪtəs, ˈæpəˌreɪtəs, -ˈrɑːtəs /

noun

  1. a collection of instruments, machines, tools, parts, or other equipment used for a particular purpose

  2. a machine having a specific function

    breathing apparatus

  3. the means by which something operates; organization

    the apparatus of government

  4. anatomy any group of organs having a specific function

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

Plural word for apparatus The plural form of apparatus can be either apparatus or apparatuses. The appropriate plural form depends on whether the term is considered to be a mass (uncountable) noun (like air or rice) or a count noun (like apple or car). When used as a mass noun, the correct plural form is apparatus, as in The lab apparatus must be removed before the lab can be painted. When used as a count noun, the correct plural form is apparatuses, as in The ship is equipped with apparatuses for security, cargo loading, and more. The plurals of several other singular words that end in -s are also formed the same way, such as pass/passes, lotus/lotuses, and dress/dresses. In some nouns that end in -us that are derived from Latin, the irregular plural ending -i may be used instead, as in fungus/fungi or cactus/cacti. These nouns are considered irregular nouns.However, this ending is not valid for apparatus. Apparati would be an invalid plural for apparatus.

Etymology

Origin of apparatus

1620–30; < Latin apparātus equipment, originally the act of equipping, preparation, equivalent to apparā ( re ) to prepare ( ap- ap- 1 + parāre; prepare ) + -tus suffix of v. action

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Few photos of him circulated publicly, and he had a security apparatus modeled after military special forces teams.

From Los Angeles Times

A 50-year-old European diplomat whose understanding of history was shaped by the educational apparatus of the past 40 years may never have heard these things, or known Americans actually think about them.

From The Wall Street Journal

To compensate for these weakened incentives, regulators build an extensive supervisory apparatus to restrain risk-taking.

From Barron's

Long focused on green and infrastructure financing, the EIB is now explicitly part of Europe’s security apparatus.

From MarketWatch

China's sprawling security apparatus has long been accused of infiltrating community organisations as a way to keep tabs on expats and dissidents.

From Barron's