to-infinitive in English dictionary to-infinitive Meanings and definitions of "to-infinitive" (grammar) The English infinitive verb form when introduced by the particle to. noun (grammar) The English infinitive verb form when introduced by the particle to. more Grammar and declension of to-infinitive to-infinitive ( plural to-infinitives) to-infinitive (plural to-infinitives) more Sample sentences with "to-infinitive" Declension Stem Try again Available translations French Japanese Korean Portuguese Spanish Authors