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WordReference English-Portuguese Dictionary © 2026:

Traduções principais
InglêsPortuguês
act⇒ vi (behave)agir v int
  comportar-se vp
 I thought he was ill, as he was acting strangely.
 Achei que ele estivesse doente, porque estava agindo de modo estranho.
 Achei que ele estivesse doente, porque estava se comportando de modo estranho.
act vi (take action)agir v int
 When I have spoken to my advisors, I will act.
 Quando tiver falado com meus assessores, vou agir.
act vi (pretend to be)agir como v int
  fingir-se vp
 He acted ill, as he didn't want to go to school.
 Ele agiu como doente, pois não queria ir à escola.
 Ele fingiu-se doente, pois não queria ir à escola.
act n (deed)ato sm
 The rescue was the act of a brave man.
 O resgate foi o ato de um homem corajoso.
act n (pretence)fingimento sm
 Her apparent calmness was all an act.
 Sua calma aparente era tudo fingimento.
act n (theatre: division) (teatro)ato sm
 The balcony scene happens in the second act.
 A cena da sacada acontece no segundo ato.
act n (law: statute)decreto sm
  lei sf
 There is an Act which outlaws such behaviour.
act n (performance)artista sm, sf
 The second act was a mime artist.
 O segundo artista foi de um ator de mímica.
Acts n (book of Bible) (livro da Bíblia)livro de Atos sm
 Acts is the fifth book of the New Testament.
 O livro de Atos é o quinto no Novo Testamento.
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Traduções complementares
InglêsPortuguês
act n (performer)artista smf
 The first act of the evening was a young comedian we had never heard of.
act vi (operate)funcionar v int
 Pressing the pedal will make the brakes act.
 Pisar no pedal fará com que os freios funcionem.
act for [sb] vi (substitute)agir v int
  substituir v int
 I will have to act for my absent brother.
 Terei que agir em nome do meu irmão ausente.
 Terei que substituir meu irmão ausente.
act [sth]⇒ vtr (perform)atuar vt
  encenar vt
 The troupe will act a few scenes from Shakespeare.
 A trupe irá atuar algumas cenas de Shakespeare.
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WordReference English-Portuguese Dictionary © 2026:

Locuções verbais
InglêsPortuguês
act on [sth] vtr phrasal insep (respond)responder a vt + prep
 Olga acted on the email she received.
 Olga respondeu ao e-mail que ela recebeu.
act on [sth] vtr phrasal insep (have effect)agir sobre vt + prep
 The engraving was the result of the acid acting on the metal.
 A estampa era resultado do ácido agindo sobre o metal.
act [sth] out,
act out [sth]
vtr phrasal sep
(enact, perform)atuar vt
 Edward and Diana acted out the first scene of the play. On the training course, employees were asked to work in pairs and act out common workplace scenarios.
 Edward e Diana atuaram a primeira cena da peça. No treinamento, os funcionários foram convidados a trabalhar em duplas e a atuar cenários comuns de trabalho.
act out vi phrasal US (misbehave)comportar-se mal expres v
 The children are acting out.
 As crianças estão comportando-se mal.
act up vi phrasal UK, informal (child: misbehave)fazer cena loc v
 Why do children always wait to be in public to act up?
 Por que as crianças esperam estarem em público para fazer cena?
act up vi phrasal informal (machine: malfunction)dar problema loc v
 The TV is acting up, but I think it's just a loose wire.
 A TV está dando problema, mas eu acho que é só um fio solto.
act up vi phrasal UK (stand in for [sb] more senior)substituir vt
 Lily was asked to act up for the six months that her manager would be away.
 Lily foi convidada para substituir seu gerente durante os seis meses que ele estaria fora.
act upon [sth] vtr phrasal insep (do [sth] in response)agir sob vt + prep
 Harry acted upon Alice's request.
act upon [sth] vtr phrasal insep (have an effect on)atuar em, agir em vt + prep
  fazer efeito em loc verb + prep
 The drug acts upon the nervous system.
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WordReference English-Portuguese Dictionary © 2026:

Formas compostas:
InglêsPortuguês
act as [sth/sb] vi + prep (perform function)agir como loc v
 When they first met each other, it was her sister who acted as matchmaker.
 The man's trousers were held up by a bit of rope that was acting as a belt.
 Quando eles se conheceram foi a irmã dela que agiu como cupido.
act in concert v expr (do [sth] together)agir de comum acordo expres
  agir em conluio expres
 The criminals were acting in concert to scam hundreds of people out of their life savings.
act in the interests of [sb/sth] vtr (act to protect or help)agir nos interesses de loc v
 An attorney will always act in the best interests of her client.
act like vi + adv informal (behave as if)agir como se vi + adv
 She acts like she thinks she is the queen.
act like vi + prep (imitate)imitar vt
 Richard made everyone laugh by acting like a monkey.
act of faith n (out of religious conviction)ato de fé sm + prep + sf
 Going on a religious pilgrimage is an act of faith.
act of faith n (demonstration of earnestness)ato de fé loc sm
 Putting down a deposit is considered an act of faith.
act of God n (natural disaster)desastre natural sm + adj
  fenômeno natural sm + adj
act of God n (law: unpreventable disaster) (Direito)caso fortuito expres
  força maior expres
 The insurance company refused to pay out, ruling that the damages resulted from an act of God.
act of grace n UK (amnesty) (ato de perdão)ato de graça, ato de clemência loc sm
act of kindness n (favour, considerate gesture) (favor)ato de bondade loc sm
 In an act of kindness he gave me his sandwich.
act of love n (action motivated by love)ato de amor sm
act of violence n (law: violent act, attack)ato de violência loc sm
act of war n (action that provokes a war)ato de guerra loc sm
 The Japanese attack on Pearl Harbor was an act of war, provoking the US to enter WWII.
act well vi + adv (actor: be convincing) (teatro)atuar bem loc v int + adv
 Little Johnny acted so well in the school play, I'm sure he'll grow up to win an Oscar.
act your age interj informal (stop behaving immaturely)agir de acordo com a sua idade loc v
 Fred should start acting his age.
clean up your act v expr informal (behave properly)mudar de atitude expres v
criminal act n (crime)ato criminoso, ação criminal loc sm
  crimes
 The man was charged with three criminal acts, the most serious being arson.
disappearing act n (magic trick)mágica de desaparição loc sf
  truque de desaparição loc sm
 The magician performed a disappearing act in which a rabbit disappeared from under a hat.
disappearing act n figurative, informal (disappearance)resolver desaparecer loc v
 Jenny does a disappearing act whenever helping with the housework is mentioned.
FOIA n US, initialism (Freedom of Information Act) (lei de direito à informação)Ato de Liberdade de Informação sm
get your act together v expr (behavior: make socially acceptable)ser sociável expres v
heroic act n (brave, selfless action) (ação abnegada)ato de heroísmo loc sm
 I was surprised by John's heroic act of giving all that money to charity.
magic act n (illusion, trick)truque de mágica loc sm
 A famous magic act involves cutting a woman in half.
opening act n (play: first part)ato de abertura loc sm
 They arrived late at the theatre and missed the opening act.
opening act n (theatre: first performer)banda de abertura loc sf
 My son's band was the opening act for the Rolling Stones concert.
power to act n (law: right to intervene) (direito legal de intervir ou agir)autoridade sf
power to act n (authority to take action) (autoridade para agir)poder de ação loc sm
read the riot act v expr figurative, informal (reprimand [sb]) (repreender alguém severamente)passar o maior sabão expres
  dar um sermão loc v
 Anyone who breaks the school rules can expect the head teacher to read the riot act.
read [sb] the riot act,
read the riot act to [sb]
v expr
figurative, informal (reprimand)dar um sermão loc v
 My curfew is midnight, but I got home at three in the morning, and my mom read me the riot act.
RICO n US, acronym (Racketeer Influenced and Corrupt Organizations Act) (Unidade de combate ao crime organizado)RICO sigla
Nota: Unidade de combate ao crime organizado. RICO é a sigla para Racketeer Influenced and Corrupt Organizations
 The company was sued under the Racketeer Influenced and Corrupt Organizations Act.
sex act n (sexual intercourse)ato sexual loc sm
 They were arrested for performing a sex act in public!
unsafe act n (action: dangerous, negligent)imprudência sf
  ação arriscada sf + adj
  ação temerária sf + adj
  ato irresponsável sm + adj
violent act n (physical aggression)ato violento sm
  (informal)violência sf
  agressão física sf
 This man is guilty of several violent acts against both women and young boys.
warm-up act n (performer: before main act)número de abertura loc sm
  show de abertura loc sm
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