- a mutual or reciprocal action or influence
- the transfer of energy between elementary particles, between a particle and a field, or between fields
See strong interaction, fundamental interaction, weak interaction, electroweak interaction
WordReference Random House Unabridged Dictionary of American English © 2026
in•ter•ac•tion
(in′tər ak′shən),USA pronunciation n.
in′ter•ac′tion•al, adj.
- reciprocal action, effect, or influence.
- Physics
- Physicsthe direct effect that one kind of particle has on another, in particular, in inducing the emission or absorption of one particle by another.
- Physicsthe mathematical expression that specifies the nature and strength of this effect.
- inter- + action 1825–35
Collins Concise English Dictionary © HarperCollins Publishers::
interaction /ˌɪntərˈækʃən/ n
in•ter•act /ˌɪntərˈækt/USA pronunciation
v.
in•ter•ac•tive, adj.: Interactive video lets the user decide what to see on the screen.
WordReference Random House Unabridged Dictionary of American English © 2026- to act upon one another: [no object]When the two chemicals interact they form a gas.[~ + with + object]One chemical interacts with the other.
in•ter•ac•tive, adj.: Interactive video lets the user decide what to see on the screen.
in•ter•act
(in′tər akt′),USA pronunciation v.i.
- to act one upon another.
- inter- + act 1740–50
'interaction' also found in these entries (note: many are not synonyms or translations):
affinity
- autism
- ballistics
- cooperation
- coordination
- cross-party
- Ekman
- electromagnetism
- electroweak interaction
- flutter
- fundamental interaction
- gauge boson
- Gell-Mann
- gravitation
- hadron
- hypercharge
- induction motor
- intermediate vector boson
- isolate
- isolation
- IUI
- law of supply and demand
- lockdown
- nuclear reaction
- phenotype
- shield
- social
- spiral
- strong interaction
- up close and personal
- weak interaction
- Yin and Yang
- acidolysis
- activity
- air shower
- alcoholysis
- alpha receptor
- amino resin
- astrophysics
- ATP
- balance of nature
- beta receptor
- bioactivity
- biosocial
- buffer
- chemistry
- coaction
- collegiality
- conservation law
- conservation of baryon number