Noun

A decade is a period of ten years. It is a commonly used unit of time in various fields, such as history, finance, and culture. For example, the 1920s, also known as the "Roaring Twenties," refers to the decade between 1920 and 1929. Similarly, the term "decade" is often used in discussions of business and financial planning to refer to a ten-year period in which long-term goals and objectives can be set and evaluated.

Example

1. The last decade has seen a significant shift towards renewable energy sources in many countries around the world.
2. The fashion trends of the 1990s are making a comeback in the current decade, with many young people adopting the "retro" look.
3. The past decade has witnessed a remarkable technological revolution, with the rise of smartphones and social media transforming the way we communicate and interact with one another.