1. A word form that has been modified by inflection to show grammatical relationships such as tense, mood, voice, aspect, person, number, gender, or case
The word 'walked' is an inflected form of the verb 'walk'
A palavra 'caminhei' é uma forma flexionada do verbo 'caminhar'
2. Any variant of a word created by adding affixes to show grammatical function
In the sentence 'The cats are sleeping', 'cats' is an inflected form showing plurality
Na sentença 'Os gatos estão dormindo', 'gatos' é uma forma flexionada que mostra pluralidade