Eon

Pronunciation: /iːɑn/

Definitions of eon

noun a very long period of time; an indefinitely long period of time

Example Sentences

A1 An eon is a very long period of time, like millions of years.

A2 Dinosaurs lived millions of years ago, during a different eon.

B1 Geologists study the different eons in Earth's history to understand its evolution.

B2 The Precambrian eon is the longest eon in Earth's history, lasting over 4 billion years.

C1 In astronomy, an eon is defined as a unit of time equal to a billion years.

C2 The concept of multiple eons in the universe's history is a fascinating topic for cosmologists.

Examples of eon in a Sentence

formal It took an eon for the starlight to reach Earth.

informal I feel like I've been waiting an eon for this package to arrive.

slang I haven't seen you in an eon, where have you been?

figurative The ancient ruins have stood for eons, a testament to the passage of time.

Grammatical Forms of eon

• past tense: occurred
• plural: eons
• comparative: more eon
• superlative: most eon
• present tense: occurs
• future tense: will occur
• perfect tense: has occurred
• continuous tense: is occurring
• singular: eon
• positive degree: eon
• infinitive: to occur
• gerund: occurring
• participle: occurred

Origin and Evolution of eon

First Known Use: 1601 year

Language of Origin: Greek

Story behind the word: The word 'eon' originated from the Greek word 'aion' meaning 'age' or 'eternity'.

Evolution of the word: Over time, the word 'eon' has come to be used in English to refer to a long, indefinite period of time, often associated with geological eras or cosmic time scales.