No it is not the skirt length or this Spring's fashion color. It is what you have in your Investment Portfolio.
Every portfolio manager has a stated investment style.
It is a general description of the goals of the portfolio manager and the kind of assets in the portfolio. In general descriptive terms are used to designate an investment style. These may be such things as Balanced, Large Cap Growth or Emerging Markets. Most of these names are very misleading. If you were to look at the portfolios of many Mutual Funds with different descriptive names indicating investment style you would find many with differing styles own the same individual stocks.