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accession (countable and uncountable, plural accessions)

  1. A coming to; the act of acceding and becoming joined
    a king's accession to a confederacy
  2. Increase by something added; that which is added; augmentation from without.
    • (Can we date this quote?) Edward Gibbon
      The only accession that the Roman empire received was the province of Britain.
  3. (law) A mode of acquiring property, by which the owner of a corporeal substance which receives an addition by growth, or by labor, has a right to the part or thing added, or the improvement (provided the thing is not changed into a different species).
  4. (law) The act by which one power becomes party to engagements already in force between other powers.
  5. The act of coming to or reaching a throne, an office, or dignity.
  6. (medicine) The invasion, approach, or commencement of a disease; a fit or paroxysm.
  7. Agreement.
  8. Access; admittance.



accession (third-person singular simple present accessions, present participle accessioning, simple past and past participle accessioned)

  1. (transitive) To make a record of (additions to a collection).


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accession f (plural accessions)

  1. accession (to throne)
  2. (law) accession
    accession sociale à la propriétéassisted home-ownership scheme

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