Equinox
noun /ˈiː.kwɪ.nɒks/ — The twice-yearly moment when day and night are equal
Definition
Either of the two times each year when the sun crosses the celestial equator, making night and day of approximately equal length. The balance point of the year.
Beyond the definition
The moment of perfect balance between light and dark — not as a permanent state, but as a threshold: after the equinox, things tip one way or the other.
Origin & history
From Latin 'aequinoctium' — 'aequus' (equal) + 'nox' (night). The night of equality.
Example sentences
Illustrative sentences for learning, not verified community posts or sourced quotations.
At the spring equinox, they planted — not because the calendar said to, but because the light said so.
The equinox is one of those calendar moments that actually corresponds to something felt.
The autumn equinox marks not just a balance but a tipping — from now, the nights get longer.
Synonyms
balance point, equal day, turning
Antonyms
Related words
Word in the Wild
See how this word appears in life, language and stories.
Illustrative sentences and imagined stories for learning — not verified sightings, interviews, or sourced quotations.
Fictional scene
Balanced Seasonal Point
A deciduous tree with fallen brown leaves on one side, bare twigs, and budding green leaves on the other under sunlight and moonlight.
The equinox is the point of balance where night and day are equal. This conceptual illustration of a tree simultaneously experiencing different stages of the cycle acts as a visual analogy: it represents the balance point of the year, showing the transition and equivalence of opposites in a single, unified moment.
Image credit: Wordspun · AI-generated conceptual illustration