drum1 [drʌm] n
[Date: 1500-1600; Origin: Probably from Dutch trom]
1.) a musical instrument made of skin stretched over a circular frame, played by hitting it with your hand or a stick
a big bass drum
1000 people marched, beating drums and carrying flags.
on drums
Trumpeter Red Rodney was playing with Kenny Clarke on drums (=playing the drums) .
Jones played the drums in an all-girl band.
2.) a large round container for storing liquids such as oil, chemicals etc
a 5 gallon oil drum
3.) something that looks like a drum, especially part of a machine
a brake drum
4.) bang/beat the drum for sb/sth
to speak eagerly in support of someone or something
The company is banging the drum for their new software.
5.) the drum of sth
a sound like the sound a drum makes
the steady drum of the rain on the window
drum 2
drum2 v past tense and past participle drummed present participle drumming
to play a drum
2.) [I and T]
to make a sound similar to a drum by hitting a surface again and again
I could hear the rain drumming against the windows.
Lisa drummed her fingers impatiently on the table.
3.) drum sth home
to use repeated arguments or messages in order to make sure that people understand something
An information booklet will be available and press advertisements will drum home the message.
drum into [drum sth into sb] [i]phr v
to keep telling someone something until they cannot forget it
'Don't talk to strangers' is a message drummed into children from an early age.
drum out of [drum sb out of sth] phr v
to force someone to leave an organization, place, or job
He was drummed out of the army.
drum up [drum sth<=>up] phr v
to get support, interest, attention etc from people by making an effort
He travelled throughout Latin America drumming up support for the confederation.
The organization is using the event to drum up business (=get more work and sales) .

Dictionary of contemporary English. 2013.