behalf of Copy link • behalf of, in or on: prō (with abl.): Divitiacus spoke on b. of the Sequani, locutus est pro Sequanis Divitiacus, Caes.: each of them strove on his own b., pro se quisque eorum certabat, Cic.: he besought the R. people on my b., populum R. pro me obsecravit, Cic.: v. for, on account of, sake.