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decay
noun
-
decay
,
decaying
,
decays
,
decayed
the
process
by
which
organic
matter
rots
or
decomposes
.
•
The
apple
showed
signs
of
decay
after
being
left
out
too
long
.
The
apple
showed
signs
of
decay
after
being
left
out
too
long
.
•
Bacteria
cause
tooth
decay
if
you
don't
brush
regularly
.
Bacteria
cause
tooth
decay
if
you
don't
brush
regularly
.
From
Middle
English
'decaye'
,
from
Old
French
'decair'
,
from
Latin
'decadere'
meaning
'to
fall
down
or
away'
,
from
'de-'
(
down
)
+
'cadere'
(
to
fall
).
verb
-
decay
,
decaying
,
decays
,
decayed
to
rot
or
decompose
gradually
due
to
bacteria
or
fungi
.
•
Food
will
decay
if
not
stored
properly
.
Food
will
decay
if
not
stored
properly
.
•
The
old
books
are
decaying
in
the
damp
basement
.
The
old
books
are
decaying
in
the
damp
basement
.
noun
-
decay
,
decaying
,
decays
,
decayed
a
gradual
decline
in
health
,
strength
,
or
quality
.
•
Urban
decay
has
affected
many
city
centers
.
Urban
decay
has
affected
many
city
centers
.
•
The
empire
suffered
from
moral
decay
.
The
empire
suffered
from
moral
decay
.
noun
-
decay
,
decaying
,
decays
,
decayed
the
spontaneous
transformation
of
a
radioactive
substance
into
a
different
element
by
emission
of
radiation
.
•
Radioactive
decay
releases
energy
.
Radioactive
decay
releases
energy
.
•
The
half-life
measures
the
rate
of
decay
.
The
half-life
measures
the
rate
of
decay
.
