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Definition of accession
(Entry 1 of 2)
1a : the act or process by which someone rises to a position of honor or power
the accession of a new queen a politician's accession to power Queen Victoria's accession to the throne/crown occurred in 1837.
b : an act of coming near or to something : approach, admittance
2 : something added : acquisition the museum's latest accessions
3a : increase by something added
b : acquisition of additional property (as by growth or increase of existing property)
4 : the act of assenting or agreeing
5a : the act of becoming joined : adherence
b : the act by which one nation becomes party to an agreement already in force between other powers
6 : a sudden fit or outburst : access
accession
verbaccessioned; accessioning; accessions
Definition of accession (Entry 2 of 2)
: to record in order of acquisition
Each book in the library had been carefully accessioned.
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Time Traveler for accession
The first known use of accession was in 1551
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