adjective: (grammar) With the subject of a transitive construction having grammatical cases or thematic relations different from that of an intransitive construction.
noun: An ergative verb or other expression.
noun: Ellipsis of ergative case (“a grammatical case used to indicate the agent of a transitive verb in ergative-absolutive languages”). [(grammar) A grammatical case used to indicate the agent of a transitive verb in ergative-absolutive languages.]
