ablative['ablətɪv]
adjective
1Grammardenoting a case indicating an agent, instrument, or source, expressed by ‘by’, ‘with’, or ‘from’ in English.
2involving ablation.
nounGrammara word in the ablative case.
Origin
ME: from OFr.ablative(fem. ofablatif), L.ablativus, fromablat-,auferre(see ablation).