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radio
noun
an
electronic
device
that
receives
broadcast
signals
and
plays
the
sound
through
a
speaker
•
Grandpa
keeps
an
old
radio
on
the
kitchen
shelf
that
plays
jazz
all
day
.
Grandpa
keeps
an
old
radio
on
the
kitchen
shelf
that
plays
jazz
all
day
.
•
The
battery
in
my
camping
radio
died
during
the
storm
.
The
battery
in
my
camping
radio
died
during
the
storm
.
Shortened
from
earlier
term
‘
radiotelegraphy
’,
from
Latin
radius
“
ray
”
+
Greek
tele
“
far
”.
noun
-
radio
the
system
or
medium
of
sending
and
receiving
sound
broadcasts
through
electromagnetic
waves
•
The
interview
was
aired
on
radio
last
night
.
The
interview
was
aired
on
radio
last
night
.
•
He
prefers
learning
languages
through
radio
because
he
can
listen
while
walking
.
He
prefers
learning
languages
through
radio
because
he
can
listen
while
walking
.
Developed
from
the
idea
of
“
radiating
”
waves
,
first
used
for
telegraphic
communication
in
the
early
1900s
.
noun
a
portable
or
fixed
two-way
communication
device
that
can
both
send
and
receive
voice
messages
•
The
firefighters
kept
in
touch
with
a
handheld
radio
while
inside
the
building
.
The
firefighters
kept
in
touch
with
a
handheld
radio
while
inside
the
building
.
•
Give
me
the
radio
so
I
can
call
the
base
.
Give
me
the
radio
so
I
can
call
the
base
.
Extension
of
earlier
sense
,
referring
to
devices
that
could
both
transmit
and
receive
radio
waves
,
popularized
during
World
War
II
.
verb
-
radio
,
radioing
,
radios
,
radioed
to
send
or
receive
a
message
using
radio
equipment
•
The
pilot
radioed
the
tower
for
landing
clearance
.
The
pilot
radioed
the
tower
for
landing
clearance
.
•
Please
radio
headquarters
once
you
reach
the
checkpoint
.
Please
radio
headquarters
once
you
reach
the
checkpoint
.
Verb
use
recorded
soon
after
radio
devices
became
common
,
meaning
‘
to
communicate
by
radio
’.
noun
-
radio
electromagnetic
waves
with
frequencies
suitable
for
transmitting
sound
,
data
,
or
images
through
the
air
or
space
•
Stars
emit
energy
,
including
radio
that
astronomers
can
detect
with
giant
dishes
.
Stars
emit
energy
,
including
radio
that
astronomers
can
detect
with
giant
dishes
.
•
The
scientist
measured
faint
radio
from
a
distant
galaxy
.
The
scientist
measured
faint
radio
from
a
distant
galaxy
.
Adopted
in
scientific
writing
in
the
early
20th
century
to
describe
the
‘
radius-like
’
spreading
of
invisible
waves
.
