Last updated 17 August 2026
Booktionary's definitions come from open, freely licensed sources. Every licence below permits redistribution inside an application, on condition of attribution. This page is that attribution; the same text also appears inside the app, behind the button at the top right of the opening screen.
Derived from Wiktionary, © Wiktionary contributors, dual-licensed under the Creative Commons Attribution-ShareAlike licence (CC BY-SA) and the GNU Free Documentation Licence (GFDL).
Structured data extracted with Wiktextract via kaikki.org — Tatu Ylonen, “Wiktextract: Wiktionary as Machine-Readable Structured Data”, Proceedings of LREC 2022. The extracted data carries the same licence as the Wiktionary source.
Supplemented by Morphalou 3.1 (ATILF / ORTOLANG), distributed under the LGPL-LR licence.
The app itself contains no third-party code. It uses only Apple's own frameworks and carries no proprietary or otherwise protected material.
A definition that looks wrong usually came in from the source data. Report it to fredddv@hotmail.com and it will be fixed in the next data build.