goldendict

Install command: 
brew install --cask goldendict

Name: GoldenDict

Feature-rich dictionary lookup program

http://goldendict.org/

/api/cask/goldendict.json (JSON API)

Cask code on GitHub

Current version: 1.5.0-RC2

Requires: macOS >= 10.12

goldendict has been officially discontinued upstream.
It may stop working correctly (or at all) in recent versions of macOS.

Analytics:

Installs (30 days)
goldendict 28
Installs (90 days)
goldendict 113
Installs (365 days)
goldendict 305
Fork me on GitHub