Dividend Reinvestment Plan - DRIP

What Does Dividend Reinvestment Plan - DRIP Mean?
A plan offered by a corporation that allows investors to reinvest their cash dividends by purchasing additional shares or fractional shares on the dividend payment date.

Investopedia explains Dividend Reinvestment Plan - DRIP
A DRIP is an excellent way to increase the value of your investment. Most DRIPs allow you to buy shares commission free and at a significant discount to the current share price. Most DRIPS don't allow reinvestments much lower than $10.

This term is sometimes abbreviated as "DRP".