Noun
The
growth
in
the
value
of
a
quantity
,
in
which
the
rate
of
growth
is
proportional
to
the
instantaneous
value
of
the
quantity
;
for
example
,
when
the
value
has
doubled
,
the
rate
of
increase
will
also
have
doubled
.
The
rate
may
be
positive
or
negative
.