non-prosequiturLaw.|nɒnprəʊˈsɛkwɪtə(r)| [L. = ‘he does not prosecute’.] A judgement entered against a plaintiff in a suit in which he does not appear to prosecute. 1768Blackstone Comm. III. xx. 296 A nonsuit, or non prosequitur, is entered; and he is said to be nonpross'd.