Cisco Certified Network Associate (CCNA) The Cisco Certified Network Associate (CCNA) certification is the second level of Cisco's five-level career certification process. A CCNA certification certifies a technician's ability to install, set up, configure, troubleshoot and operate a medium-sized routed and switched computer network.
Freebase(0.00 / 0 votes)Rate this definition: Retraining. Vocational rehabilitation or retraining is the process of learning a new skill or trade, often in response to a change in the economic environment. Generally it reflects changes in profession rather than an upward movement in the same field.
retractor. 1  a person or thing that retracts. 2  Anatomy. a muscle that retracts an organ or protruded part. 3  Surgery. an instrument or appliance for drawing back an impeding part, as the edge of an incision. 4  a mechanism, device, or the like that regulates retraction: to adjust the retractor on a seat belt.