Install on Chromebook
If you're on a Chromebook, the DPD browser extension is your friend. It runs right inside Chrome, so there's nothing else to install — just add it and double-click any Pāḷi word to look it up.
See the browser extension page for full instructions.
If you'd rather use a standalone dictionary app, you can also try your luck with MDict from the Play Store or the Linux version of GoldenDict NG, following the relevant instructions.