ETYM French ablatif, ablative, Latin ablativus from ablatus. Related to Ablation.
1. Tending to ablate; i.e. to be removed or vaporized at very high temperature.
2. (Linguistics) Relating to the ablative case.

The case indicating the agent in passive sentences or the instrument or manner or place of the action described by the verb; SYN. ablative case.
Indicating direction from or time when
Signifying agency
In the grammar of certain inflected languages, such as Latin, the ablative case is the form of a noun, pronoun, or adjective used to indicate the agent in passive sentences or the instrument, manner, or place of the action described by the verb.