Definitions
1.noun(grammar) the infinitive mood or mode (a grammatical mood)
2.noun(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.
3.noun(grammar) A verbal noun formed from the infinitive of a verb.
4.adjective(grammar) Formed with the infinitive.
5.adjectiveUnlimited; not bounded or restricted; undefined.