For most 'retirement' simply means stopping doing paid work and choosing how to spend your time.
For some people this might mean relaxing and doing nothing other than what occurs to you on the day, but for others who enjoy being busy, organised and on the run all the time retirement means continuing to be busy, organised and on the run all the time but having more control over what we do and how and when.
I think few of us are ever entirely fancy free in retiement. Retirement for me has included looking after elderly relatives, nursing my daughter for sometime after an accident, and, of course, grandchild care, not much in my case because we live so far away, but we have done DIY, helped with moves and done all sorts of other jobs for our adult children.
This Duracell bunny intends to keep rushing around doing things as long as she can.