PRO BONO Meaning of PRO BONO in English /proh' boh"noh/done or donated without charge; free: pro bono legal services.Also, pro-bono . [ 1720-30; pro bono for (the) good, rightly, morally ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012