1
- Grammar denoting a case (especially in Latin) of nouns and pronouns and words in grammatical agreement with them indicating an agent, instrument, or source, expressed by 'by', 'with', or 'from' in English【语法】（尤指拉丁语中）离格的（指名词、代词和相关词语的格, 表示施动者、工具或来源, 在英语中用by, with或from来表达）。
2
- (of surgical treatment) involving ablation（外科治疗）切除术的。
3
- of, relating to, or subject to ablation through melting or evaporation（有关）融化（或蒸发）的,易遭融化（或蒸发）的：
the spacecraft's ablative heat shield.
宇宙飞船的防烧蚀隔热罩。
词源
late Middle English: from Old French ablative （feminine of ablatif ）, Latin ablativus, from ablat- 'taken away' （see ABLATION）.