1. To move into a particular kind of living arrangement when one retires. My parents sold our big family home and retired into a small villa off the coast of Spain. I have no intention of retiring into some old folks' home, thank you very much.

2. To enter into a particular situation or set of conditions upon one's retirement. I had the misfortune of retiring into a floundering economy, so my investments were either not making as much as I'd been counting on, or else were outright losing money. After working so hard all my life, I'm looking forward to retiring into a life of rest and relaxation.

3. To withdraw to some location in order to rest or seek seclusion. Ah, what a wonderful meal. Shall we retire into the drawing room, everyone? He retired into a corner of the room, overwhelmed by the number of people at the party.