Definitions for "nineties"
Keywords:  decade, bug, ton, spent, solve
The decade from 1890 to 1899; as, the gay nineties.
The decade from 1990 to 1999; as, they spent a ton of money to solve the Y2K bug in the nineties.
Keywords:  ages, life, time
The time of life between ages 90 and 100.