| oblivion / oblivious | esquecimento = the state of something that is not remembered, used, or thought about any more; "the names of the people who lived here long ago have faded into oblivion" // esquecido; oblivious of = esquecido de, inconsciente de |
| obnoxious | insolente, detestável = unpleasant in a way that makes people feel offended, annoyed, or disgusted; hateful; offensive; "some teenagers were being loud and obnoxious" |
| obscene | obsceno, indecente = dirty, nasty, filthy, indecent |
| odor; odour | odor, cheiro; an unpleasant odor |
| offense (US); offence (UK) | 1) ataque = attack, assault / 2) ofensa, crime, pecado = a violation or breaking of a social or moral rule |
| offhand | improvisado; de improviso = without preparation |
| okra | quiabo = lady's fingers; gumbo (Abelmoschus esculentus) |
| oldie | popular no passado = a song, joke, movie, etc., that was popular at a time in the past. |
| omen / ominous | agouro, presságio; "evil omen" / agourento, nefasto, preocupante, de mau agouro = suggesting that something bad is going to happen in the future; "an ominous threat of war" |
| onslaught | ataque violento; investida = an especially fierce attack; something resembling such an attack; "an onslaught of technological changes" |
| opossum | gambá |
| oracle | oráculo, profecia |
| ounce (abrev.: oz) | onça (peso) = aprox. 31 g |
| outback | área distante e não povoada = the country far away from cities, towns, or villages especially in Australia; bush (The bush), backwoods, wilderness |
| outboard | do lado externo = located on the outside of a ship's hull or aircraft / outboard motor = motor de popa |
| outburst | explosão (raiva, choro, etc) = a sudden and often violent release, outpouring, or eruption: |
| outcast | rejeitado, excomungado, pária = a person who is rejected or cast out, as from home or society |
| outrage (n) / outrage (to) / outrageous | escândalo, atrocidade / ofender, ultrajar, injuriar // 1) escandaloso, ultrajante, chocante; "outrageous crime"; "outrageous behaviour" / 2) exorbitante, abusivo; "outrageous price" |
| outsource (to) / outsourcing | terceirizar // terceirização, trabalho feito por outra empresa, normalmente fora da empresa-cliente; "the company outsources everything except core competencies" / (obs: contractor = empresa que fornece recursos para trabalhar como terceiros na empresa-cliente) |
| ovation | aclamação, ovação |
| overdraft | saque a descoberto; overdrafting checking = cheque especial |
| overhaul / overhaul (to) | revisão completa (mecânica) = thorough repair // revisar, reparar |
| overlook (to) / overlook (n) | 1) ver do alto = to look down upon from above // 2) passar por alto, não ver, não fazer caso, ignorar; "the opportunity should not be overlooked"; "the detective overlooked an important clue" // mirante, belvedere = a high place with a good view; "there's a great overlook where you can get a panoramic view of the valley below" |
| overrate (to) | exagerar o valor; superestimar = overestimate |
| override (to) | 1) cancelar, anular, ignorar = to give a command that cancels the effect of something; "press that button to override the system" // 2) sobrepor // 3) passar por cima = to prevail over |
| overrun (to) | transpor; ultrapassar = to run beyond, to overflow |
| oversee (to) | inspecionar, supervisionar = to direct workers as a supervisor; to supervise |
