View synonyms for accession


[ ak-sesh-uhn ]


  1. the act of coming into the possession of a right, title, office, etc.:

    accession to the throne.

  2. an increase by something added:

    an accession of territory.

  3. something added:

    a list of accessions to the college library.

  4. Law. addition to property by growth or improvement.
  5. consent; agreement; approval:

    accession to a demand.

  6. International Law. formal acceptance of a treaty, international convention, or other agreement between states.
  7. the act of coming near; approach.
  8. an attack or onset, as of a disease.

verb (used with object)

  1. to make a record of (a book, painting, etc.) in the order of acquisition.
  2. to acquire (a book, painting, etc.), especially for a permanent collection.


/ əkˈsɛʃən /


  1. the act of entering upon or attaining to an office, right, condition, etc
  2. an increase due to an addition
  3. an addition, as to a collection
  4. property law
    1. an addition to land or property by natural increase or improvement
    2. the owner's right to the increased value of such land
  5. international law the formal acceptance of a convention or treaty
  6. agreement; consent
  7. a less common word for access


  1. tr to make a record of (additions to a collection)

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Derived Forms

  • acˈcessional, adjective

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Other Words From

  • ac·cession·al adjective
  • nonac·cession noun
  • reac·cession noun
  • unac·cession·al adjective

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Word History and Origins

Origin of accession1

1580–90; < Latin accessiōn- (stem of accessiō ) an approach, addition. See access, -ion

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Example Sentences

NATO, Finland, and Sweden will have ample reason to accelerate the accession process.

From Time

After EU accession, the donor landscape for watchdogs and activist groups fundamentally changed for countries in Eastern Europe.

The disputes have been major stumbling blocks for Croatia's accession into both NATO and the European Union.

An accession agreement with Europe represented a chance for this struggling, isolated nation to become part of the modern world.

In an October poll, 53 percent of Ukrainians supported accession to the EU, while only 35 percent were against.

Feinstein explicitly called for one in her remarks, specifically demanding Russia's accession.

Six weeks after the victory of Zurich came the 18th Brumaire, and Napoleon's accession to the consulate.

It was not till the accession of the July monarchy that the Duke of Treviso once again played a prominent part.

A violent reaction took place on the accession of Decius, whose name became an object of execration to mankind.

Ruined by the Revolution, he had regained his properties and income on the accession of the Bourbons.

His accession to the throne was opposed by the archduke of Austria, and gave rise to one of the most bloody wars on record.


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accessibleaccession number