interactions

/IH0 N T ER0 AE1 K SH AH0 N Z/
noun
  1. 1

    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. 2

    A conversation or exchange between people.

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

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Source: https://en.wiktionary.org/wiki/interaction, https://en.wiktionary.org/wiki/interactions