equinox definition by Wordo

Noun

One

of

two

times

in

the

year

(

one

in

March

and

the

other

in

September

)

when

the

length

of

the

day

and

the

night

are

equal

,

which

occurs

when

the

sun

is

directly

overhead

at

the

equator

;

this

marks

the

beginning

of

spring

in

one

hemisphere

and

autumn

in

the

other

.