whatsa

https://github.com/kjleitz/whatsa

Whatsa harnesses the POWER OF WIKIPEDIA, allowing you to quickly search a word or phrase and receive a short (one paragraph) summary about that subject, right from the command line! Type 'more' to get a longer summary, 'other' to pick a specific category about that subject, and more. If you're too vague, Whatsa allows you to select from a disambiguation of topics.