ablative case(n = noun.communication) ablative - the case indicating the agent in passive sentences or the instrument or manner or place of the action described by the verb;
is a kind of oblique, oblique case

ablative, ablative absolute, accusative case, antitrust case, attache case, borderline case, case, case agreement, case hardened, case history, case in point, case knife, case law, case load, case officer, case shot, case study, case system, charity case, cigarette case, custody case, dative case, dispatch case, display case, dressing case, gear case, genitive case, glasses case, grammatical case, gun case, in any case, in case, in one case, index case, just in case, letter case, lower case, make a federal case, mental case, nominative case, nut case, objective case, oblique case, overnight case, packing case, pencil case, possessive case, sad case, special case, spore case, subject case, terminal case, test case, timbale case, tool case, trespass on the case, trophy case, upper case, vanity case, vocative case, watch case, welfare case, wing case