If someone is seconded, they are sent to work in a different place or job for a while, usually by their employer.
Being seconded can be a good thing because it can mean new experiences and opportunities.
Examples:
She was seconded to the New York office for six months.
He got seconded to a different team for a special project.
They seconded her to the marketing department for a few weeks.
I wish I could get seconded to a beach for the summer!
He got seconded to the space station for a whole year!
Being seconded to a different country can be very exciting.