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.
The only accession which the Roman empire received, during the first century of the Christian Aera, was the province of Britain.1776–1788, Edward Gibbon, chapter 1, in The History of the Decline and Fall of the Roman Empire, volume (please specify |volume=I to VI), London: […] W[illiam] Strahan; and T[homas] Cadell, […], →OCLC, page 5:
1803, John Browne Cutting, “A Succinct History of Jamaica” in Robert Charles Dallas, The History of the Maroons, London: Longman and Rees, Volume 1, p. xli, […] armed vessels being provided, their crews were soon recruited by accessions from the needy or adventurous, the discontented or the bold.
3
Such augmentation that adds to the collections of a museum or archive; a thing thus added.
4
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).
5
Law The act by which one power becomes party to engagements already in force between other powers.
accession to the European Union
6
The act of coming to or reaching a throne, an office, or dignity.
her accession to the throne
This is the 6 ft. 4-6-0 engine No. 8301, Springbok, the second design produced by Mr. Edward Thompson since his accession to office as Chief Mechanical Engineer.1943 March and April, “L.N.E.R. New Mixed-Traffic 4-6-0 Locomotive”, in Railway Magazine, page 104:
1 more example
Charles will be formally proclaimed King at a historic Accession Council in an ancient ceremony at St James’s Palace on Saturday, it has been announced.2022 September 9, Caroline Davies, “Charles to be proclaimed King at St James’s Palace on Saturday”, in The Guardian:
7
Medicine, Sciences The invasion, approach, or commencement of a disease; a fit or paroxysm.
8
Agreement.
9
Access; admittance.
10
A group of plants of the same species collected at a single location, often held in genebanks.
11
Scotland Complicity, concurrence or assent in some action.