The word wealth has many shades of meaning, but most involve having a lot of something — often money or something else that's valuable. You might have a wealth of experience, or you might have great personal wealth.
First used in the mid-13th century, the noun wealth can mean having a lot of material goods or money. A person with this kind of wealth may have a chateau in Italy with a vineyard and a personal yacht. Wealth can also mean a big supply of something. The birth of a newborn baby will surely bring a wealth of happiness and joy to a family.