Interaction
- 63rd World Science Fiction Convention
- ACM Interactions
- Aromatic interaction
- Biological interaction
- Cation-pi interaction
- Cell–cell interaction
- Drug interaction
- Fundamental interaction
- Gene–environment interaction
- Human–computer interaction
- Interact (disambiguation)
- Interaction (album)
- Interaction (statistics)
- Interaction hypothesis
- Interactions (The Spectacular Spider-Man)
- Interactions of actors theory
- Metallophilic interaction
- Protein–protein interaction
- Social interaction