1 [ab-luh-tiv] Grammar.
(in some inflected languages) noting a case that has among its functions the indication of place from which or, as in Latin, place in which, manner, means, instrument, or agent.
the ablative case.
a word in that case, as Troiā in Latin Aenēas Troiā vēnit, “Aeneas came from Troy.”

1400–50; late Middle English < Latin ablātīvus. See ablate, -ive

ablatival [ab-luh-tahy-vuhl] , adjective
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2 [a-bley-tiv] ,
capable of or susceptible to ablation; tending to ablate: the ablative nose cone of a rocket.

1560–70; ablate + -ive

ablatively, adverb
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
ablative (ˈæblətɪv)
1.  (in certain inflected languages such as Latin) denoting a case of nouns, pronouns, and adjectives indicating the agent in passive sentences or the instrument, manner, or place of the action described by the verb
2.  a.  the ablative case
 b.  a word or speech element in the ablative case
3.  taking away or removing: ablative surgery
4.  able to disintegrate or be worn away at a very high temperature: a thick layer of ablative material

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

mid-15c., from M.Fr. ablatif, from L. (casus) ablativus "(case) of removal," expressing direction from a place or time, coined by Julius Caesar from ablatus "taken away," pp. of auferre "carrying away," from ab- "away" + irregular verb ferre (pp. latum; see oblate) "to carry, to bear" (see infer).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Non-ablative laser resurfacing does not have the same severe after-effects as other laser treatments.
The locative is identical to the ablative in the fourth and fifth declension.
The locative, ablative, and dative are identical in the plural.
The golf ball is covered with a ablative material which is heated by the solar wind it is plowing through.
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