1. not active; not doing anything or not working
2. not participating in activities or not functioning
3. not currently in use or operation

Examples

• The volcano has been inactive for over a century.
• She led an inactive lifestyle, spending most days watching television.
• The inactive account was closed due to lack of use.
• Many students become inactive during summer break.
• The inactive ingredients in the medicine don’t affect its potency.
• His inactive participation in class discussions concerned the teacher.
• The inactive website hadn’t been updated in years.