infinitive

noun

1. The infinitive mood or mode (a grammatical mood).

   “The MANNERS of acting, in grammar called modes or moods, are four; Infinitive, Imperative, Indicative, Subjunctive or Conjunctive.”

   “There are four moods, the Infinitive, Imperative, Indicative, and Subjunctive. [...] the Infinitive is used to express a thing in a general manner.”

2. 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.
3. A verbal noun formed from the infinitive of a verb.

adj

1. (not-comparable)Formed with the infinitive.

   “INFINITIVE MOOD or MANNER. To Have, Avoir.”

   “In English there are four moods:–1. The Infinitive Mood. 2. The Indicative Mood. 3. the Imperative Mood. 4. The Subjunctive Mood.”

2. (not-comparable)Unlimited; not bounded or restricted; undefined.

   “[…] to search out in some higher region of infinitive space a spot where it was impossible for defilement to follow them […]”