1. beings that live on or come from Earth, especially as distinguished from extraterrestrial life
Usage: often used in science fiction contexts
2. land-dwelling organisms as opposed to aquatic or aerial ones
Usage: biological or ecological contexts

Examples

• The movie depicted first contact between terrestrials and alien visitors.
• Scientists compared the behavior of terrestrials with that of extraterrestrial life forms.
• The research focused on how terrestrials adapted to different land environments.
• In the story, terrestrials had to defend Earth from invasion.
• The biologist studied both terrestrials and aquatic species in the ecosystem.
• Terrestrials have evolved various strategies for surviving on land.