What does it mean to invest defensively?

It means to invest in various funds and spread your money out. So many people think they can make it rich on one stock. I got news for you. IT NEVER WORKS. Why do I say that? Because I've tried it numerous times. Try getting yourself into some nice index funds. Spread your money around in various industries and financial sectors. Also go international. America is not the only place with commerce, and as you've probably seen already, India and China are growing tremendously right now. Make sure to play the emerging markets. Take care. I hope I answered your question.