1. the act or process of agreeing to or consenting to something; assent.
Usage: formal or literary; often used in legal or diplomatic contexts
2. the act of acceding to or entering into an office, position, or rank.
Usage: formal; often historical or ceremonial

Examples

• The treaty required the accedence of all member nations before it could take effect.
• Her accedence to the throne was celebrated throughout the kingdom.
• The board's accedence to the proposal came after weeks of negotiation.
• His accedence to the presidency marked a significant shift in policy.
• We sought the accedence of the committee before proceeding with the plan.
• The accedence of the new member to the organization was formally announced.