inflection

American  

[in-flek-shuhn] / ɪnˈflɛk ʃən /

especially British, inflexion

noun

1. modulation of the voice; change in pitch or tone of voice.

2. Grammar. Also

   1. the process or device of adding affixes to or changing the shape of a base to give it a different syntactic function without changing its form class.

   2. the paradigm of a word.

   3. a single pattern of formation of a paradigm.

      noun inflection; verb inflection.

   4. the change in the shape of a word, generally by affixation, by means of which a change of meaning or relationship to some other word or group of words is indicated.

   5. the affix added to produce this change, as the -s in dogs or the -ed in played.

   6. the systematic description of such processes in a given language, as in serves from serve, sings from sing, and harder from hard (contrasted with derivation).

3. a bend or angle.

4. Mathematics. a change of curvature from convex to concave or vice versa.

---

inflection British  

/ ɪnˈflɛkʃən /

noun

1. modulation of the voice

2. (grammar) a change in the form of a word, usually modification or affixation, signalling change in such grammatical functions as tense, voice, mood, person, gender, number, or case

3. an angle or bend

4. the act of inflecting or the state of being inflected

5. maths a change in curvature from concave to convex or vice versa See also point of inflection

---

inflection Cultural  

1. A change in the form of a word to reflect different grammatical functions of the word in a sentence. English has lost most of its inflections. Those that remain are chiefly possessive ('s), as in “the boy's hat”; plural (-s), as in “the three girls”; and past tense (-d or -ed), as in cared. Other inflections are found in pronouns — as in he, him, his — and in irregular words such as think/thought, child/children, and mouse/mice.

---

Other Word Forms

• inflectional
  adjective
• inflectionally
  adverb
• inflectionless
  adjective
• preinflection
  noun

Etymology

Origin of inflection

1525–35; variant spelling of inflexion < Latin inflexiōn- (stem of inflexiō ) a bending. See inflect, -ion

Explanation

Inflection refers to the ups and downs of a language. Even if you can’t understand Italian yet, the inflection in your professor’s voice should tip you off to whether she's asking a question, giving a command, or making a joke. What began in the 1500s as a noun of action spelled inflexion has since evolved into inflection, a word with grammatical connotation. Inflection most often refers to the pitch and tone patterns in a person’s speech: where the voice rises and falls. But inflection also describes a departure from a normal or straight course. When you change, or bend, the course of a soccer ball by bouncing it off another person, that’s an example of inflection.

Example Sentences

Calling it “an inflection point” for the business, the PC maker said it expects the infrastructure business to become another engine for growth and profitability.

From The Wall Street Journal • May 22, 2026

In particular, small-cap earnings growth appears to have reached an inflection point in August 2025, according to Shiran.

From MarketWatch • May 16, 2026

Liani added that Akamai’s cloud infrastructure services, or CIS, segment is at an inflection point with “momentum supported by AI workloads and edge inference use cases.”

From Barron's • May 13, 2026

“We are at an inflection point with AI, and the choices companies and regulators make now will shape how this technology impacts everyday people,” he said in a statement.

From Los Angeles Times • May 6, 2026

His voice had little inflection, and he always seemed to speak through clenched teeth.

From "Newjack: Guarding Sing Sing" by Ted Conover

Related Words

• articulation
• pronunciation
• timbre
• tone of voice