Adjective
and
minimal
.
Noun
A
violent
windstorm
of
limited
extent
,
as
the
tornado
,
characterized
by
an
inward
spiral
motion
of
the
air
with
an
upward
current
in
the
center
;
a
vortex
of
air
.
It
usually
has
a
rapid
progressive
motion
.