Infinitive meaning : (grammar) the infinitive mood or mode (a grammatical mood) (grammar) A non-finite verb form considered neutral with respect to inflection; depending on language variously found used with auxiliary verbs, in subordinate clauses, or acting as a gerund, and often as the dictionary form. (grammar) A verbal noun formed from the infinitive of a verb. (grammar) Formed with the infinitive. Unlimited; not bounded or restricted; undefined.