A decade (from Ancient Greek: δεκάς, dekas, lit. 'group of 10') is a period of 10 years. It may also be called a decennium (from Latin: decennium, lit. 'ten-year').

The meaning of DECADE is a group or set of 10. How to use decade in a sentence.

DECADE definition: 1. a period of ten years, especially a period such as 2010 to 2019 2. a period of ten years…. Learn more.

Definition of decade noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

DECADE definition: a period of ten years. See examples of decade used in a sentence.

May 7, 2025 · The term "decade" describes a period of ten years and serves as a useful framework for understanding time, history, and trends. Its versatility makes it invaluable in both everyday and …

Feb 25, 2026 · Although a decade may refer to any group of ten years, it often particularly refers to the informal ten-year periods of the calendar whose last digits run from 0 to 9.

Decade definition: A period of ten years.

dec•ade (dek′ ād; Brit. also də kād′), n. a period of ten years: the three decades from 1776 to 1806. a period of ten years beginning with a year whose last digit is zero: the decade of the 1980s. a group, …

She was so nervous to see her high school sweetheart at their reunion: it had been a decade (ten years) since she'd seen him at graduation, and she still got butterflies thinking about him.