decades
nounUK /ˈdɛkeɪdz/
US /ˈdɛkeɪdz/
Decades are groups of ten years.
My grandparents have been married for six decades.
RELATED WORDS
OTHER MEANINGS
2. Plural of decade, meaning a period of ten years.
The building has stood for three decades.
3. A set or group of ten things.
The poem is arranged in decades of lines.
4. A long stretch of time in a person's life or in history.
She spent decades teaching at the local school.