Noun
A
perceived
change
in
some
function
,
sensation
or
appearance
of
a
person
that
indicates
a
disease
or
disorder
,
such
as
fever
,
headache
or
rash
;
strictly
,
a
symptom
is
felt
or
experienced
by
the
patient
,
while
a
sign
can
be
detected
by
an
observer
.