What does accede mean?
The definition of accede
Ac*cede”, v. i.
[imp. & p. p. Acceded; p. pr. & vb. n. Acceding.]
Etym: [L. accedere to approach, accede; ad + cedere to move, yield: cf. F. accédere. See Cede.]

1 To approach; to come forward; — opposed to recede. [Obs.] T. Gale.
2 To enter upon an office or dignity; to attain. Edward IV., who had acceded to the throne in the year 1461. T. Warton. If Frederick had acceded to the supreme power. Morley.
3 To become a party by associating one’s self with others; to give one’s adhesion. Hence, to agree or assent to a proposal or a view; as, he acceded to my request. The treaty of Hanover in 1725 . . . to which the Dutch afterwards acceded. Chesterfield.

Synonyms
— To agree; assent; consent; comply; acquiesce; concur.