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effectiveness
noun
-
effectiveness
the
ability
of
someone
or
something
to
achieve
the
result
that
is
wanted
or
intended
•
The
effectiveness
of
the
new
vaccine
surprised
even
the
researchers
.
The
effectiveness
of
the
new
vaccine
surprised
even
the
researchers
.
•
We
measured
the
advertising
campaign
’
s
effectiveness
by
tracking
online
sales
.
We
measured
the
advertising
campaign
’
s
effectiveness
by
tracking
online
sales
.
From
effective
+
-ness
,
first
recorded
in
the
1600s
.
noun
-
effectiveness
the
state
of
being
in
force
or
legally
operative
•
The
contract
’
s
effectiveness
starts
on
July
1
.
The
contract
’
s
effectiveness
starts
on
July
1
.
•
Parliament
debated
the
legal
effectiveness
of
the
emergency
decree
.
Parliament
debated
the
legal
effectiveness
of
the
emergency
decree
.
Same
origin
as
Sense
1
;
extended
in
legal
writing
to
mean
“
being
in
effect
.”
