Noun
A
device
used
to
slow
or
stop
the
motion
of
a
wheel
,
or
of
a
vehicle
,
usually
by
friction
(
although
other
resistive
forces
,
such
as
electromagnetic
fields
or
aerodynamic
drag
,
can
also
be
used
);
also
,
the
controls
or
apparatus
used
to
engage
such
a
mechanism
such
as
the
pedal
in
a
car
.
Verb
To
operate
(
a
)
brake
(
s
).