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caller
noun
a
person
who
makes
a
phone
call
•
The
caller
said
she
had
dialed
the
wrong
number
and
apologized
.
The
caller
said
she
had
dialed
the
wrong
number
and
apologized
.
•
The
receptionist
asked
the
caller
to
wait
while
she
transferred
the
line
.
The
receptionist
asked
the
caller
to
wait
while
she
transferred
the
line
.
Derived
from
the
verb
“
call
”
+
the
agent
suffix
“
-er
”,
first
recorded
in
the
early
17th
century
for
visitors
,
later
for
telephone
users
.
noun
a
person
who
announces
directions
,
numbers
,
or
events
to
guide
or
entertain
a
group
,
especially
in
square
dancing
or
bingo
•
The
square-dance
caller
shouted
the
next
move
to
the
dancers
.
The
square-dance
caller
shouted
the
next
move
to
the
dancers
.
•
Our
bingo
caller
drew
the
number
B-12
and
the
crowd
groaned
.
Our
bingo
caller
drew
the
number
B-12
and
the
crowd
groaned
.
Extension
of
“
caller
”
from
telephone
sense
to
anyone
who
‘
calls
out
’
instructions
or
numbers
,
mid-20th
century
.
noun
in
computing
,
the
part
of
a
program
or
function
that
invokes
another
function
or
procedure
•
If
the
operation
fails
,
the
function
returns
an
error
code
to
the
caller
.
If
the
operation
fails
,
the
function
returns
an
error
code
to
the
caller
.
•
In
this
library
,
the
caller
must
free
any
memory
it
allocates
.
In
this
library
,
the
caller
must
free
any
memory
it
allocates
.
Borrowed
from
general
sense
of
a
person
who
calls
;
used
in
computer
science
since
the
1970s
.
