Pro Bono Definition

prō bōnō

adjective

Provided free or at low-cost to certain legal clients in order to serve the public good.

A lawyer's pro bono representation of low-income families.

American Heritage

Designating professional services provided, without compensation, for charitable organizations, poor persons, etc.

Webster's New World

(law) Done without fee, generally for clients of humble means.

The firm currently has about half a dozen pro bono cases at any one time.

Wiktionary

adverb

In a manner without fee.

After he retired, he offered pro bono representation from time to time.

Wiktionary

Origin of Pro Bono

Latin prō bonō (publicō) for the (public) good prō for bonō ablative of bonum the good

From American Heritage Dictionary of the English Language, 5th Edition
Abbreviated from Latin pro bono publico for the public good.

From Wiktionary