interaction

American  

[in-ter-ak-shuhn] / ˌɪn tərˈæk ʃən /

noun

1. reciprocal action, effect, or influence.

2. Physics.

   1. the direct effect that one kind of particle has on another, in particular, in inducing the emission or absorption of one particle by another.

   2. the mathematical expression that specifies the nature and strength of this effect.

---

interaction British  

/ ˌɪntərˈækʃən /

noun

1. a mutual or reciprocal action or influence

2. physics the transfer of energy between elementary particles, between a particle and a field, or between fields See strong interaction electromagnetic interaction fundamental interaction gravitational interaction weak interaction electroweak interaction

---

Other Word Forms

• interactional adjective

Etymology

Origin of interaction

First recorded in 1825–35; inter- + action

Example Sentences

Until recently, however, scientists did not know how much this new interaction was affecting penguin population numbers.

From Science Daily

They argue that incorporating these details into climate models would improve predictions of ocean and atmosphere interactions, long-term carbon storage, and the interpretation of sediment records used to reconstruct Earth's climate history.

From Science Daily

She thinks seeing these genuine human interactions is what makes people so emotionally invested in livestreams like this one, which are often recommended to Katie and other users on the TikTok app.

From BBC

World Liberty also said it played no role in Zhao’s pardon and that its business interactions with Binance have been routine.

From The Wall Street Journal

Researchers have uncovered the molecular interactions that give spider silk its remarkable combination of strength and flexibility.

From Science Daily

Related Words

• communication
• cooperation
• synergy