Noun
A
widespread
banking
system
in
which
a
bank
that
accepts
deposits
from
the
public
puts
the
majority
of
those
deposits
into
investments
(
generating
a
profit
for
the
bank
)
as
opposed
to
keeping
them
all
in
reserve
(
i
.
e
.,
directly
on
hand
);
the
system
assumes
that
it
is
unlikely
that
every
customer
would
need
to
withdraw
their
money
at
the
same
time
(
i
.
e
.,
a
bank run
).