1. To select someone for or appoint someone to some different position, duty, role, office, etc., or to a different location where a new job, etc., is located. A noun or pronoun is used between "reassign" and "to." They're reassigning me to their office in Hong Kong. We're thinking about reassigning you to the IT department. Would you be interested in that?

2. To redirect something to some other cause, purpose, utility, etc. A noun or pronoun is used between "reassign" and "to." We're reassigning the funding to a different department. The new initiative aims to reassign resources to those schools and teachers that need them most desperately.