Definition of augmentative adjective from the Oxford Advanced American Dictionary

 

augmentative

 adjective
adjective
NAmE//ɔɡˈmɛntət̮ɪv//
 
(linguistics)
 
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(of an affix or a word using an affix) increasing a quality expressed in the original word, especially by meaning “a large one of its kind”
See the Oxford Advanced Learner's Dictionary entry: augmentative