# accessional

CEFR C2 · Adjective

Source: https://englishreference.com/word/accessional
Updated: 2026-06-04

## Definition

relating to something that is added or extra. It is an old word that describes things that come after the main part of something.

For teachers: relating to or serving as an addition or supplement.

## Examples

- The library added several accessional books to the collection.
- The legal team reviewed the accessional documents to ensure all supplementary evidence was included in the final filing.
- While the primary treaty was signed in 1815, the accessional agreements that followed provided the necessary framework for resolving territorial disputes in the subsequent decades.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.