Causa in a sentence as a noun

The author of the letter has earned at least a doctorate honoris causa.

It's considered seriously naff to title yourself Dr. on the strength of an honorary doctorate, though — at the very least, you should add "honoris causa".

Causa definitions

noun

a comprehensive term for any proceeding in a court of law whereby an individual seeks a legal remedy; "the family brought suit against the landlord"

See also: lawsuit suit case cause