- (medicine) The invasion, approach, or commencement of a disease; a fit or paroxysm.
- Increase by something added; that which is added; augmentation from without.
- The act of coming to or reaching a throne, an office, or dignity.
- Access; admittance.
- A coming to; the act of acceding and becoming joined; as, a king's accession to a confederacy.
- (law) The act by which one power becomes party to engagements already in force between other powers.
- (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).
- (transitive) To make a record of (additions to a collection).