Meaning
The systematic process of moving software, data, or infrastructure from one platform, framework, or schema to another.
Three examples from work
Database changes
DevDid you test the schema migration against production-sized datasets?
LeadYes, adding the column index took under three seconds without table locking.
Cloud migration
CTOOur AWS to Google Cloud migration is scheduled for this weekend.
DevOpsWe will switch DNS traffic incrementally using weighted routing.
Incident post-mortem
PMWhy did the user login fail after yesterday's deployment?
LeadA database migration failed to execute on one of the secondary read replicas.
Common types: 'database migration', 'cloud migration', 'data migration'. Always ensure a verified rollback path exists before executing.