Definition of "inflectional" [in•flec•tion•al]

• Of or pertaining to inflection. (adjective)
• Of or pertaining to a point of inflection of a curve. (adjective)

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• "Throbert McGee: and still have a good recollection of the rather complicated patterns of inflectional suffixes for Latin nouns andverbs."
• "Akkadian, meanwhile, is inflectional, so that a basic root can be modified to create words with different, if related, meanings by adding vowels, suffixes, and prefixes."
• "Su and Cheung are both in the process of releasing much-needed new child corpora, with Su focusing on (if I remember correctly) optional infinitives (to the extent such can be recognized in a language with no inflectional morphology) and lexical tone, and Cheung focusing on argument structure alternations."