1. the process of communicating or working together with someone or something
Usage: plural form of interaction
2. the way that two or more things have an effect on each other
Usage: often used in scientific contexts

Examples

• The teacher encouraged more interactions between students during group work.
• Social interactions help children develop communication skills.
• The medication may cause dangerous interactions with alcohol.
• Scientists study the interactions between different species in the ecosystem.
• Online interactions have become increasingly important in modern society.
• The interactions between the chemicals produced an unexpected reaction.
• Her positive interactions with customers improved sales significantly.