millennium

CEFR: C1

A continuous period of one thousand years (plural: 'millennia' or 'millenniums'). In IELTS Academic Writing Task 2 and Reading, it is frequently used to discuss historical developments, cultural evolution, and climate changes over deep time. SPELLING TRAP: Consistently misspelled with single 'l' or single 'n'. Remember the double-double rule: two 'l's and two 'n's (m-i-l-l-e-n-n-i-u-m).

Synonyms

thousand-year period
eon

Common Collocations

turn of the millennium
for over a millennium
spanning millennia

Example Sentence

Agricultural techniques in the river valley remained virtually unchanged for nearly a millennium before mechanisation.