Longman Dictionary of Contemporary English homepage

interact

 verb
     
in‧ter‧act [intransitive]
1 if people interact with each other, they talk to each other, work together etc
interact with
Lucy interacts well with other children in the class.
2 if one thing interacts with another, or if they interact, they affect each other
interact with
The immune system interacts with both the nervous system and the hormones.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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