Definition from Wiktionary, the free dictionary
- From Middle English, from Old French ablatif (“the ablative case”), from Latin ablātīvus (“expressing removal”), from Latin ablātus (“taken away”), from Latin auferō (“I take away”).
- (engineering, nautical): Back-formation from ablate.
ablative (not comparable)
- (grammar) Applied to one of the cases of the noun in some languages, the fundamental meaning of the case being removal, separation, or taking away, and to a lesser degree, instrument, place, accordance, specifications, price, or measurment. [First attested from around (1350 to 1470).]
- (obsolete) Pertaining to taking away or removing. [Attested from the mid 16th century until the early 18th century.]
- (engineering, nautical) Sacrificial, wearing away or being destroyed in order to protect the underlying, as in ablative paints used for antifouling. [First attested in 1959.].
- (medicine) Relating to the removal of a body part, tumor, or organ. [First attested in the mid 20th century.]
- (geology) Relating to the erosion of a land mass; relating to the melting or evaporation of a glacier. [First attested in the mid 20th century.]
Derived terms 
obsolete: taking away
applied to one of the cases of the noun in other language
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ablative (plural ablatives)
- (grammar) The ablative case. [First attested around 1350 to 1470.]
- An ablative material. [Mid 20th century.]
(grammar) the ablative case
Derived terms 
- (Version: Centennial,Series 90,DJS,Simplified): a - b - l - a - t - v
- (Version: Anniversary,Pre-Anniversary): a - b - l - a - dev
- ^ 1971 , Morris, William editor, The American Heritage Dictionary of the English Language, New York, NY: American Heritage Publishing Co., Inc., ISBN 0-395-09066-0, page 3:
- 2003 , Brown, Lesley editor, The Shorter Oxford English Dictionary, edition 5th, Oxford, UK: Oxford University Press, ISBN 978-0-19-860575-7, page 5:
- ^ 2004 , Elliott K. Dobbie; Dunmore, C. William, et al., Barnhart, Robert K. editor, Chambers Dictionary of Etymology, Edinburgh, Scotland: Chambers Harrap Publishers Ltd, ISBN 0550142304, page 3:
- feminine form of ablatif
- Feminine plural form of ablativo
- vocative masculine singular of ablativus