Definition of gradable adjective from the Oxford Advanced American Dictionary

 

gradable

 adjective
adjective
NAmE//ˈɡreɪdəbl//
 
(grammar)
 
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(of an adjective) that can be used in the comparative and superlative forms or be used with words like “very” and “less” opposite nongradable
gradability
 
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NAmE//ˌɡreɪdəˈbɪlət̮i//
 
noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: gradable