Princeton's WordNet

1. interaction(noun)

   a mutual or reciprocal action; interacting

2. interaction, fundamental interaction(noun)

   (physics) the transfer of energy between elementary particles or between an elementary particle and a field or between fields; mediated by gauge bosons

Wiktionary

1. interaction(Noun)

   The situation or occurrence in which two or more objects or events act upon one another to produce a new effect; the effect resulting from such a situation or occurrence.

   Be aware of interactions between different medications.

2. interaction(Noun)

   A conversation or exchange between people.

   I enjoyed the interaction with a bunch of like-minded people.

Webster Dictionary

1. Interaction(noun)

   intermediate action

2. Interaction(noun)

   mutual or reciprocal action or influence; as, the interaction of the heart and lungs on each other

• wisselwerkingAfrikaans
• تَفاعُلArabic
• взаимодействиеBulgarian
• interaçãoPortuguese (BR)
• interakceCzech
• die WechselwirkungGerman
• gensidig påvirkning; interaktionDanish
• αλληλεπίδραση, διάδρασηGreek
• interacciónSpanish
• koostoimeEstonian
• فعل و انفعالFarsi
• vuorovaikutusFinnish
• interactionFrench
• פְּעוּלַת גוֹמליִןHebrew
• पारस्परिक व्यवहारHindi
• interakcija, uzajamno djelovanjeCroatian
• kölcsönhatásHungarian
• interaksiIndonesian
• víxlverkun; gagnkvæm áhrifIcelandic
• interazioneItalian
• 相互作用Japanese
• 상호 작용Korean
• sąveikaLithuanian
• mijiedarbība; savstarpēja iedarbībaLatvian
• interaksiMalay
• wisselwerkingDutch
• gjensidig påvirkningNorwegian
• wzajemne oddziaływaniePolish
• فعل و انفعالPersian
• متقابل عمل، معامله، متقابله اغيزهPashto
• interacçãoPortuguese
• interacţiuneRomanian
• взаимодействиеRussian
• interakciaSlovak
• medsebojno vplivanjeSlovenian
• komunikacijaSerbian
• ömsesidig påverkan, växelverkanSwedish
• ปฏิกิริยาThai
• etkileşimTurkish
• 相互作用Chinese (Trad.)
• взаємодіяUkrainian
• باہمی تعاملUrdu
• sự tương tácVietnamese
• 互相作用Chinese (Simp.)