Proper noun
The
one-day
Biblical
feast
or
festival
(
not
a
holy day
)
that
begins
at
twilight
at
the
beginning
of
the
fourteenth
day
of
the
first
month
(
Abib
14
/
Nisan
14
),
during
which
the
first-born
sons
of
the
Israelites
were
passed
over
while
those
of
the
Egyptians
were
killed
;
this
feast
day
is
then
immediately
followed
by
the
seven-day
Feast
of
Unleavened
Bread
(
Nisan
15
to
21
;
the
first
and
seventh
days
are
holy days
or
annual
or
yearly
Sabbaths
).