infinitive

American  

[in-fin-i-tiv] / ɪnˈfɪn ɪ tɪv /

noun

1. infin.

   1. in English, the simple or basic form of a verb, with no endings to indicate the verb’s subject or tense, such as come, take, eat, be: used after auxiliary verbs or preceded by the word to, and sometimes functioning as a noun, such as He must be, I want to eat, To love is to understand.

   2. a verb form found in many other languages that has a similar function, such as French venir “to come” or Latin esse “to be.”

---

adjective

1. consisting of or containing an infinitive: infin.

   an infinitive construction.

infinitive British  

/ ɪnˈfɪnɪtɪv, ˌɪnfɪnɪˈtaɪvəl /

noun

1. a form of the verb not inflected for grammatical categories such as tense and person and used without an overt subject. In English, the infinitive usually consists of the word to followed by the verb

---

infinitive Cultural  

1. The simple or dictionary form of a verb: walk, think, fly, exist. Often the word to marks a verb as an infinitive: “to walk,” “to think,” “to fly,” “to exist.”

---

Usage

What is an infinitive? An infinitive is the basic form of a verb, having no tense and not being conjugated. In English, an infinitive is preceded by the word to. In English, the infinitive form of the verb is the one you will see listed in dictionaries like this one. When infinitives are used in sentences, they follow auxiliary verbs, as in I should try,  or function words, as in I want to sleep. Infinitives can serve other purposes as well, such as acting like nouns (To err is human), adjectives (I have no place to sleep), or adverbs (We eat to live).

Other Word Forms

• infinitival adjective
• infinitively adverb

Etymology

Origin of infinitive

First recorded in 1425–75; late Middle English, from Late Latin infīnītīvus “indefinite”; equivalent to in- ³ + finite + -ive

Compare meaning

How does infinitive compare to similar and commonly confused words? Explore the most common comparisons:

• gerund vs. infinitive

Explanation

"To be or not to be?" In his most famous line, Hamlet was using the infinitive form of the verb "be." The infinitive form of a verb is its most basic form, usually its "to" version. The word infinitive comes from the Latin infinitus meaning "unbounded, unlimited." When a verb is in its infinite form, it's not limited or bound by its subject or tense. Contrast "to be" with "was" — was is tied to the past tense and a single person. Strip away the word to from "to be" and you have what's known as a bare infinitive. Keep the to there and you've got a full infinitive.

Example Sentences

Sitaridou's analysis of the Romeyka infinitive is key.

From Science Daily • Apr. 2, 2024

Correct French would not have used the infinitive “tuer,” but rather the past participle, ending with an “e” to agree with the female writer, Ms. Marchal.

From New York Times • Nov. 20, 2021

Several chalkboard placards display notes on different topics, including the definition of an infinitive, the four types of tissue, and capital cities in New England.

From Washington Post • Nov. 8, 2017

Mount says the split infinitive is perfectly acceptable.

From BBC • May 13, 2013

With the infinitive, use forbid: She was forbidden to go.

From "Woe Is I" by Patricia T. O'Conner