Longman Dictionary of Contemporary English homepage

powerful

adjective
     
pow‧er‧ful W2
1

important

a powerful person, organization, group etc is able to control and influence events and other people's actions [↪ powerless]:
He was one of the most powerful men in Bohemia.
a very influential and powerful family
rich and powerful nations
2

speech/film etc

having a strong effect on someone's feelings or opinions:
a powerful speech
powerful reasons/arguments (=reasons that make you think that something must be true)
Good teamwork is a powerful tool (=very effective method) for effective management.
3

feeling/effect

a powerful feeling or effect is very strong or great:
Immigrants have had a powerful influence on the local culture.
a powerful sense of tradition
4

machine/weapon etc

a powerful machine, engine, weapon etc is very effective and can do a lot:
a new generation of more powerful PCs
a machine that is immensely powerful
a powerful 24 valve engine
a powerful telescope
5

physically strong

physically strong:
Jed was a powerful, well-built man.
The females are smaller and less powerful than the males.
6

a lot of force

a powerful blow, explosion etc has a lot of force:
an explosion ten times more powerful than the Hiroshima bomb
a powerful right-foot shot on goal
winds powerful enough to uproot trees
7

medicine

MD a powerful medicine or drug has a very strong effect on your body
8

team/army etc

a powerful team, army etc is very strong and can easily defeat other teams or armies:
a powerful fighting force
9

quality

very strong, bright, loud etc:
a powerful singing voice
the powerful headlights
powerfully adverb:
Christie is very powerfully built.
all-powerfulWORD FOCUS: strong WORD FOCUS: strong
person: tough, muscular, wiry, powerful

thing: tough, sturdy, durable, rugged, heavy-duty, indestructible, well-made, robust

country/organization: powerful, mighty, influential, dominant
strong

See also
strong

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